Version 4.0.2 is available, it fixes the following bugs:

• fix renaming of options with command /item rename
• don't send "key_pressed" signal again for the same key press
• don't send "key_combo_*" signals for incomplete keys
• add key ctrl-backspace in /help key
• keep keys ctrl-H and ctrl-? (in lower case) if they were manually bound to custom commands in a previous version