Is there a way to delete a hotkey assignment?

[Painterly]

This is really bugging me because I wanted to change my brush into an eraser by using the "E" key, but "E" is already assigned to the eraser tool in each profile number. Hitting Escape exits the hotkey window. Delete or backspace assigns delete or backspace as the hotkey! There are no buttons unassign or blank out a hotkey entry. Is there something I'm missing?

[support]

Double click faster at the hotkey (E) until it flash by red, then press Esc(or a new hotkey).

[Painterly]

Actually, the 1.55 update that came out the next day (when I originally posted) fixed it Hitting Escape now erases the hotkey assignment without closing the window. Thanks for fixing that!