diff --git a/src/lib/main.py b/src/lib/main.py
index 29911f6..dfbccfb 100644
--- a/src/lib/main.py
+++ b/src/lib/main.py
@@ -989,7 +989,7 @@ def __init__(self, parent=None,app=None):
         self.ui.actionCut.triggered.connect(self.actionCut)
         self.ui.actionCopy.triggered.connect(self.actionCopy)
         self.ui.actionPaste.triggered.connect(self.actionPaste)
-        self.ui.pushButtonUpload.setEnabled(True)
+        self.ui.pushButtonUpload.setEnabled(False)
         
         # enable buttons
         self.ui.pushButtonDelete.setEnabled(False)
@@ -1235,14 +1235,15 @@ def defaults(self):
         self.showMessage(_translate("Message","Tonino reset to defaults",None))
     
     def uploadScale(self):
-        scale = self.app.scales.getCoefficients()        
-        scale = [0.]*(4-len(scale)) + scale # ensure a 4 element scale
-        self.app.setScale(self.app.toninoPort,scale)
-        self.app.scales.setDeviceCoefficients(self.app.getScale(self.app.toninoPort))
-        if self.app.currentFile and self.app.getModel() == 1:
-            scaleName = self.app.strippedName(self.app.currentFile).split(".")[0]
-            self.app.setScaleName(self.app.toninoPort,scaleName)
-        self.showMessage(_translate("Message","Scale uploaded",None))
+        if self.app.toninoPort and self.app.scales.getCoefficients():
+            scale = self.app.scales.getCoefficients()        
+            scale = [0.]*(4-len(scale)) + scale # ensure a 4 element scale
+            self.app.setScale(self.app.toninoPort,scale)
+            self.app.scales.setDeviceCoefficients(self.app.getScale(self.app.toninoPort))
+            if self.app.currentFile and self.app.getModel() == 1:
+                scaleName = self.app.strippedName(self.app.currentFile).split(".")[0]
+                self.app.setScaleName(self.app.toninoPort,scaleName)
+            self.showMessage(_translate("Message","Scale uploaded",None))
         
     def addCoordinate(self,retry=True):
         try:
diff --git a/src/translations/tonino_de.ts b/src/translations/tonino_de.ts
index edc8682..0b937fb 100755
--- a/src/translations/tonino_de.ts
+++ b/src/translations/tonino_de.ts
@@ -18,17 +18,17 @@
         <translation>Speichern unter</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1553"/>
+        <location filename="../lib/main.py" line="1554"/>
         <source>Do you want to save your changes?</source>
         <translation>Wollen Sie die Änderungen speichern?</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1552"/>
+        <location filename="../lib/main.py" line="1553"/>
         <source>The scale has been modified.</source>
         <translation>Die Skala wurde geändert.</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1460"/>
+        <location filename="../lib/main.py" line="1461"/>
         <source>Do you want to update to %s?</source>
         <translation>Wollen Sie auf Version %s aktualisieren?</translation>
     </message>
@@ -48,7 +48,7 @@
         <translation>Skala anwenden</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1459"/>
+        <location filename="../lib/main.py" line="1460"/>
         <source>The Tonino firmware is outdated!</source>
         <translation>Die Tonino Firmware ist veraltet!</translation>
     </message>
@@ -63,12 +63,12 @@
         <translation>Kalibrierung</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1384"/>
+        <location filename="../lib/main.py" line="1385"/>
         <source>Tonino*</source>
         <translation></translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1386"/>
+        <location filename="../lib/main.py" line="1387"/>
         <source>Tonino**</source>
         <translation></translation>
     </message>
@@ -337,12 +337,12 @@
         <translation>Die Firmware wurde aktualisiert</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1437"/>
+        <location filename="../lib/main.py" line="1438"/>
         <source>Connecting...</source>
         <translation>Verbinden...</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1488"/>
+        <location filename="../lib/main.py" line="1489"/>
         <source>Connected to Tonino</source>
         <translation>Verbunden mit Tonino</translation>
     </message>
@@ -357,12 +357,12 @@
         <translation>Werkseinstellung wiederhergestellt</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1260"/>
+        <location filename="../lib/main.py" line="1261"/>
         <source>Coordinate out of range</source>
         <translation>Koordinate außerhalb des erlaubten Bereichs</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1245"/>
+        <location filename="../lib/main.py" line="1246"/>
         <source>Scale uploaded</source>
         <translation>Skala übertragen</translation>
     </message>
@@ -387,17 +387,17 @@
         <translation>Kalibrierung aktualisiert</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1475"/>
+        <location filename="../lib/main.py" line="1476"/>
         <source>Not connected</source>
         <translation>Nicht Verbunden</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1494"/>
+        <location filename="../lib/main.py" line="1495"/>
         <source>Scale could not be retrieved</source>
         <translation>Skala konnte nicht empfangen werden</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1490"/>
+        <location filename="../lib/main.py" line="1491"/>
         <source>Connected to TinyTonino</source>
         <translation>Verbunden mit TinyTonino</translation>
     </message>
diff --git a/src/translations/tonino_es.ts b/src/translations/tonino_es.ts
index f242479..ae9548e 100755
--- a/src/translations/tonino_es.ts
+++ b/src/translations/tonino_es.ts
@@ -18,12 +18,12 @@
         <translation></translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1553"/>
+        <location filename="../lib/main.py" line="1554"/>
         <source>Do you want to save your changes?</source>
         <translation>¿Desea guardar los cambios?</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1460"/>
+        <location filename="../lib/main.py" line="1461"/>
         <source>Do you want to update to %s?</source>
         <translation>¿Desea actualizar a %s?</translation>
     </message>
@@ -43,12 +43,12 @@
         <translation>Aplicar Escala</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1459"/>
+        <location filename="../lib/main.py" line="1460"/>
         <source>The Tonino firmware is outdated!</source>
         <translation>¡El firmware de Tonino está desactualizado!</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1552"/>
+        <location filename="../lib/main.py" line="1553"/>
         <source>The scale has been modified.</source>
         <translation>La escala ha sido modificada.</translation>
     </message>
@@ -63,12 +63,12 @@
         <translation>Calibración</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1384"/>
+        <location filename="../lib/main.py" line="1385"/>
         <source>Tonino*</source>
         <translation></translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1386"/>
+        <location filename="../lib/main.py" line="1387"/>
         <source>Tonino**</source>
         <translation></translation>
     </message>
@@ -337,12 +337,12 @@
         <translation>Firmware actualizado correctamente</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1437"/>
+        <location filename="../lib/main.py" line="1438"/>
         <source>Connecting...</source>
         <translation>Conectando...</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1488"/>
+        <location filename="../lib/main.py" line="1489"/>
         <source>Connected to Tonino</source>
         <translation>Conectado a Tonino</translation>
     </message>
@@ -357,12 +357,12 @@
         <translation>Tonino restaurado a valores por defecto</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1260"/>
+        <location filename="../lib/main.py" line="1261"/>
         <source>Coordinate out of range</source>
         <translation>Coordinar fuera de rango</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1245"/>
+        <location filename="../lib/main.py" line="1246"/>
         <source>Scale uploaded</source>
         <translation>Escala cargada</translation>
     </message>
@@ -387,17 +387,17 @@
         <translation>Calibración actualizada</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1475"/>
+        <location filename="../lib/main.py" line="1476"/>
         <source>Not connected</source>
         <translation>No conectado</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1494"/>
+        <location filename="../lib/main.py" line="1495"/>
         <source>Scale could not be retrieved</source>
         <translation>La escala no pudo ser recuperar</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1490"/>
+        <location filename="../lib/main.py" line="1491"/>
         <source>Connected to TinyTonino</source>
         <translation>Conectado a TinyTonino</translation>
     </message>
diff --git a/src/translations/tonino_fr.ts b/src/translations/tonino_fr.ts
index d93b8e4..7b81737 100755
--- a/src/translations/tonino_fr.ts
+++ b/src/translations/tonino_fr.ts
@@ -18,12 +18,12 @@
         <translation></translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1553"/>
+        <location filename="../lib/main.py" line="1554"/>
         <source>Do you want to save your changes?</source>
         <translation>Voulez-vous sauvegarder les modifications ?</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1460"/>
+        <location filename="../lib/main.py" line="1461"/>
         <source>Do you want to update to %s?</source>
         <translation>Voulez-vous installer la nouvelle version %s ?</translation>
     </message>
@@ -43,12 +43,12 @@
         <translation>Appliquer Échelle</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1459"/>
+        <location filename="../lib/main.py" line="1460"/>
         <source>The Tonino firmware is outdated!</source>
         <translation>Il y a une nouvelle version du logiciel !</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1552"/>
+        <location filename="../lib/main.py" line="1553"/>
         <source>The scale has been modified.</source>
         <translation>L&apos;échelle a été modifiée.</translation>
     </message>
@@ -63,12 +63,12 @@
         <translation>Calibrage</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1384"/>
+        <location filename="../lib/main.py" line="1385"/>
         <source>Tonino*</source>
         <translation></translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1386"/>
+        <location filename="../lib/main.py" line="1387"/>
         <source>Tonino**</source>
         <translation></translation>
     </message>
@@ -337,12 +337,12 @@
         <translation>La mise à jour a été correctement installée</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1437"/>
+        <location filename="../lib/main.py" line="1438"/>
         <source>Connecting...</source>
         <translation>Connection en cours...</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1488"/>
+        <location filename="../lib/main.py" line="1489"/>
         <source>Connected to Tonino</source>
         <translation>Connecté à Tonino</translation>
     </message>
@@ -357,12 +357,12 @@
         <translation>Tonino utilise les paramètres par défaut</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1260"/>
+        <location filename="../lib/main.py" line="1261"/>
         <source>Coordinate out of range</source>
         <translation>Les coordinées sont hors limite</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1245"/>
+        <location filename="../lib/main.py" line="1246"/>
         <source>Scale uploaded</source>
         <translation>Échelle chargée</translation>
     </message>
@@ -387,17 +387,17 @@
         <translation>Étalonnage mis à jour</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1475"/>
+        <location filename="../lib/main.py" line="1476"/>
         <source>Not connected</source>
         <translation>Non connecté</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1494"/>
+        <location filename="../lib/main.py" line="1495"/>
         <source>Scale could not be retrieved</source>
         <translation>L&apos;échelle n&apos;a pas pu être récupéré</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1490"/>
+        <location filename="../lib/main.py" line="1491"/>
         <source>Connected to TinyTonino</source>
         <translation>Connecté à TinyTonino</translation>
     </message>
diff --git a/src/translations/tonino_it.ts b/src/translations/tonino_it.ts
index 1b968a9..6382578 100755
--- a/src/translations/tonino_it.ts
+++ b/src/translations/tonino_it.ts
@@ -18,12 +18,12 @@
         <translation></translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1553"/>
+        <location filename="../lib/main.py" line="1554"/>
         <source>Do you want to save your changes?</source>
         <translation>Vuoi salvare i cambiamenti?</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1460"/>
+        <location filename="../lib/main.py" line="1461"/>
         <source>Do you want to update to %s?</source>
         <translation>Vuoi aggiornare alla versione %s?</translation>
     </message>
@@ -43,12 +43,12 @@
         <translation>Applica scala</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1459"/>
+        <location filename="../lib/main.py" line="1460"/>
         <source>The Tonino firmware is outdated!</source>
         <translation>Il firmware di Tonino è obsoleto!</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1552"/>
+        <location filename="../lib/main.py" line="1553"/>
         <source>The scale has been modified.</source>
         <translation>La scala è stata modificata.</translation>
     </message>
@@ -63,12 +63,12 @@
         <translation>Calibrazione</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1384"/>
+        <location filename="../lib/main.py" line="1385"/>
         <source>Tonino*</source>
         <translation></translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1386"/>
+        <location filename="../lib/main.py" line="1387"/>
         <source>Tonino**</source>
         <translation></translation>
     </message>
@@ -337,12 +337,12 @@
         <translation>Il firmware è stato aggiornato</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1437"/>
+        <location filename="../lib/main.py" line="1438"/>
         <source>Connecting...</source>
         <translation>Connessione in corso...</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1488"/>
+        <location filename="../lib/main.py" line="1489"/>
         <source>Connected to Tonino</source>
         <translation>Collegato a Tonino</translation>
     </message>
@@ -357,12 +357,12 @@
         <translation>Tonino resettato all&apos;impostazione di base</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1260"/>
+        <location filename="../lib/main.py" line="1261"/>
         <source>Coordinate out of range</source>
         <translation>Coordinate fuori dal range</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1245"/>
+        <location filename="../lib/main.py" line="1246"/>
         <source>Scale uploaded</source>
         <translation>Scala caricata</translation>
     </message>
@@ -387,17 +387,17 @@
         <translation>La calibrazione è stato aggiornato</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1475"/>
+        <location filename="../lib/main.py" line="1476"/>
         <source>Not connected</source>
         <translation>Non collegato</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1494"/>
+        <location filename="../lib/main.py" line="1495"/>
         <source>Scale could not be retrieved</source>
         <translation>La scala non è stata ricevuto</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1490"/>
+        <location filename="../lib/main.py" line="1491"/>
         <source>Connected to TinyTonino</source>
         <translation>Collegato a TinyTonino</translation>
     </message>
diff --git a/src/translations/tonino_nl.ts b/src/translations/tonino_nl.ts
index 92e12c3..83beba7 100755
--- a/src/translations/tonino_nl.ts
+++ b/src/translations/tonino_nl.ts
@@ -13,12 +13,12 @@
         <translation>Versie</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1460"/>
+        <location filename="../lib/main.py" line="1461"/>
         <source>Do you want to update to %s?</source>
         <translation>Wilt u updaten naar %s?</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1553"/>
+        <location filename="../lib/main.py" line="1554"/>
         <source>Do you want to save your changes?</source>
         <translation>Wilt u uw wijzigingen opslaan?</translation>
     </message>
@@ -43,12 +43,12 @@
         <translation>Schaal Toepassen</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1459"/>
+        <location filename="../lib/main.py" line="1460"/>
         <source>The Tonino firmware is outdated!</source>
         <translation>De Tonino firmware is verouderd!</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1552"/>
+        <location filename="../lib/main.py" line="1553"/>
         <source>The scale has been modified.</source>
         <translation>De schaal is gewijzigd.</translation>
     </message>
@@ -63,12 +63,12 @@
         <translation>Kalibratie</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1384"/>
+        <location filename="../lib/main.py" line="1385"/>
         <source>Tonino*</source>
         <translation></translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1386"/>
+        <location filename="../lib/main.py" line="1387"/>
         <source>Tonino**</source>
         <translation></translation>
     </message>
@@ -352,22 +352,22 @@
         <translation>Tonino voorkeuren resetten</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1245"/>
+        <location filename="../lib/main.py" line="1246"/>
         <source>Scale uploaded</source>
         <translation>Schaal geupload</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1260"/>
+        <location filename="../lib/main.py" line="1261"/>
         <source>Coordinate out of range</source>
         <translation>Coordinaat buiten bereik</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1437"/>
+        <location filename="../lib/main.py" line="1438"/>
         <source>Connecting...</source>
         <translation>Verbinden...</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1488"/>
+        <location filename="../lib/main.py" line="1489"/>
         <source>Connected to Tonino</source>
         <translation>Verbonden met Tonino</translation>
     </message>
@@ -392,17 +392,17 @@
         <translation>Kalibratie geupdatet</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1475"/>
+        <location filename="../lib/main.py" line="1476"/>
         <source>Not connected</source>
         <translation>Niet verbonden</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1494"/>
+        <location filename="../lib/main.py" line="1495"/>
         <source>Scale could not be retrieved</source>
         <translation>Schaal kon niet worden ontvangen</translation>
     </message>
     <message>
-        <location filename="../lib/main.py" line="1490"/>
+        <location filename="../lib/main.py" line="1491"/>
         <source>Connected to TinyTonino</source>
         <translation>Verbonden met TinyTonino</translation>
     </message>