Opening Anamnesis while Anamnesis is still open leads to a permanently loading instance that doesn't acknowledge when other instances are closed.

[Featherbrew]

Step 1: Load Anamnesis.
Step 2: Forget you opened Anamnesis.
Step 3: Load Anamnesis.
Step 4: Get an error saying "Close other instances."
Step 5: Press "Quit"
Step 6: Close the other instance.

There's no step 7 except enjoy becoming Anamnesis-Man with the symbol on your chest (or opening task manager)

[Featherbrew]

[Yuki-Codes]

fixed this in commit: quit button in error dialog must terminate process at any cost