Question about update from 3.88 to 4.23

Hello, I've been using Advanced Renamer for a while, always stuck on 3.88 though. Now I updated to 4.23, however I noticed that the folder menu is no longer located on the right side. I really liked this positioning and I haven't found in the settings how to once again have the folders on the right. Having to swap between menu's to edit methods and add different files will add a layer of annoyance that previously wasn't there, since I could simply have methods open on the left and folders on the right.

I hope someone can tell me how to change this so the folders are on the right again, thanks in advance.