- added an extra check if old preferences files are detected, a check if the type of the values is the same with the type in the current preferences file. If the type is not the same then the current type is preferred.

FlatCAMApp.py

@@ -3829,7 +3829,23 @@ class App(QtCore.QObject):
             if 'version' not in defaults or defaults['version'] != self.defaults['version']:
                 for k, v in defaults.items():
                     if k in self.defaults and k != 'version':
-                        self.defaults[k] = v
+
+                        # check if the types are the same. Because some types (tuple, float, int etc)
+                        # may be stored as strings we check their types.
+                        try:
+                            target = eval(self.defaults[k])
+                        except NameError:
+                            # it's an unknown string leave it as it is
+                            target = deepcopy(self.defaults[k])
+
+                        try:
+                            source = eval(v)
+                        except NameError:
+                            # it's an unknown string leave it as it is
+                            source = deepcopy(v)
+
+                        if type(target) == type(source):
+                            self.defaults[k] = v
 
                 # delete old factory defaults
                 try: