Editor not working, enter key / backspace / delete button not working – quick fix
To resolve the problem you have to go to:
Tools -> Preferences -> Accelerators -> Load Preset -> Default -> OK

Technical notes, and other ideas.
Editor not working, enter key / backspace / delete button not working – quick fix
To resolve the problem you have to go to:
Tools -> Preferences -> Accelerators -> Load Preset -> Default -> OK