Hi Axel, sorry I don't quite understand the question.

First of all let me make sure - are you talking about the version 5 beta and the new "UI Theme" function?

There is an option to switch it under the Options dialog, under Options > General > "UI Theme".

But there are already dark and light themes built in and you can switch just by changing the dropdown here, you don't need to copy any files just to do a switch:



- Michael