That doesn't make any sense... I installed the add-on. Choose a sub-forum for auto-promotion. Choose the custom article layout. Went to a thread in that forum and it had the article layout. I went back and turned the article layout off. Went back to the thread and it will still there. You're saying I have to manually go through 5000 threads and un-article them just to have them in the default forum layout? That doesn't sound sensible. I deactivated the add-on just to have them show up like normal threads.
As a note, I'd flipped this on and off a couple of times and whether it shows up in the article format is even sporadic... I couldn't get it to work consistently. Went to bed one night after turning the article setting off then the next morning it looked fine. Is this being cached somewhere? As I said, I have about 5400 threads this is affecting, so is there just a long process running in the background?
I have not gone to any thread and promoted or unpromoted it. I have only ever used the XenPorta options page. I haven't so much as touched the threads in any way shape or form.