: Vector recommends using this selector rather than manually assigning a specific version as the Windows default, as manual assignments can break when you install newer updates.
When you have multiple versions or service packs of Vector software installed (e.g., CANoe 10.0 and CANoe 11.0), Windows needs a way to decide which one opens your configuration files. The is the background application that handles this logic: cantools version selector download
While many developers search for this in the context of the popular Python library cantools , the "Version Selector" is a proprietary Windows component rather than a standalone Python download. What is the CANtools Version Selector? : Vector recommends using this selector rather than