Game Mover is a program that allows you to move games between launcher libraries that are saved on different drives without breaking anything (hopefully 🙃).
WARNING: If you want to move games that are installed inside C:\Program Files or C:\Program Files (x86) you need to launch Game Mover as admin.
After opening Game Mover first add a launcher (just the name), then add the folders that contain the games. You can add multiple launchers with multiple library folders. Moving a game can be done by selecting a game and pressing the "Move it" button below the folder you want to move it to. Moving a game creates a directory junction that points to the new location. Games that have been moved are marked with a small graphic that displays where they have been moved to. Returning a game to its original location can be done the same way.
Game Mover can also be used to just manage junctions in general, not just games.
Game Mover uses the Sun Valley theme for ttk by rdbende.