The profile manager let multiple Solfege users share a login on your operating system. The profiles will share the config file, but they will have separate statistics and test results.

The profile manager will display at program startup if more than one profile exists. You can also access the profile manager by selecting Profile Manager from the File.

Check Don't ask at startup if you don't want to see the profile manager at startup. It will then remember the last profile selected when you close the profile manager and start the program with that profile.