Yes, delete the uicustom folder from your game's directory. The plugin will recreate it from 0 on next game start.
Viewing post in [RPG Maker] WYSIWYG UI Editor - Main Menu comments
Amazing thanks! I have 2 more questions for you though. I dont see any option to choose what commands dont show up, I want to remove formation and save for example and second there seems to no option to change font sizes aside from player name and class and the plugin is overriding my normal font size selection. thanks