Hello, please contact me directly through a form, so I can send you a personalized version.
https://itch.io/blog/694860/undermax-support-page
I don't know if this is what you were looking for, if by "Items" you mean Weapons and Protectors, I added a small plugin command that allows you to select the currently equipped object of a specific actor and reduce its durability. If it is something else, I fear it will not be possible.
This plugin is quite complex to customize as it works in a quite specific way.
All the best!