I tried the replacement file what you provided here and the main thread of your work, just somehow didn't work either.
Then after I compared the old client and the new, I found that there is something differerent in these 'world' folders, not only 'world1','world2','world3','world4', 'world9' but also the others. Last, succeeded after doing so: all the 'world' folders must be deleted and copy the 'world' folders from old client for replacement.
May be there are changes also in other world folders conflicting with each others.
One more question: why the NPCs in devias are at the wrong location, same npc location as in the reskin devias? How to fix it?
Thx.