The current version of MVVM Light had a couple of issues in the project templates. The most annoying one was causing a problem when creating new projects: The GUIDs used to uniquely identify the project were in fact not re-generated properly every time, and we ended up with the same GUID in every new project. The symptoms are the following: If you side-load an MVVM Light application, and then side-load another one, you will see that the first one is overwritten. Note however that this is only an issue when side-loading applications: The GUIDs are properly re-generated and overwritten by Microsoft during the app approval process.
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