Oh, if you need any support, please visit Discord and create a question there. Discord has a notification system that will tell me when you ask, so I can provide answers much quicker compared to itch.io; it's in real-time as well.
For Pictures UI Creator, it should work well with Action Combat, it basically doesn't do anything when you enable it and you don't need to copy or create any new folders. You simply use default Pictures folder of RPG Maker. I also recommend using version 1.3.0 instead of the version from the demo. That demo is very dated.
So, looking forward to supporting you via Discord :D