Forum Answered Back from vbulletin 4.0.1 to 3.8, is posible?
 

I upgraded version 3.8 to 4, but things had problems and we do not have time to fix fast. I wonder if there is a possibility to go back to version 3.8?

Because it could install the 4 on another server (as it should have done), where I can go testing the skin and use that system with time.