Unfortunately, now it becomes trickier. I'm sorry if I gave you some false promise when you asked about the compatibility with YEP Skill Core, and you expected this to be true for YEP Item Core as well.
YEP Item Core is adding a lot of new windows that my plugin cannot control. I will see what I can do to make both plugins compatible, and then come back to you. Please give me some time.
If I cannot make it in a reasonable time, and the incompatibility turns out to be a deal breaker for you, I can also offer a refund, because a plugin that doesn't work in your game does not help either you or me.