Registry Finder 2.46 run as normal or admin user.
1) I delete the value: .zip (REG_SZ) Data: Snes9x.Win32
2) in the bottom History panel I select last action and choose "Redo action"
3) now I try "Undo action"...
... a bogus empty key value: .zip (REG_NONE) appears but it's a ghost item that disappears when I change registry folder and go back to FileAssociations...
It looks buggy and confusing form a user perspective.
Expected: 2 should have been ignored (nonsense to repeat a deletion when the value has already been deleted), and 3 should have just restored the original key.