How to clear all plugins expect database
 

:( My friends added so much plugins in my forum and now I need to clear all for a new forum but uninstall Product not effect database , many tables and colums still out there and I got a lot database problem , is there anyway for clean my database back to vbulletin dabatase default , also about files of those products my source now almost 300Mb , I dont know how to scan and clean them all , so big . I tried to make a new forum with new source and only back up few tables ( user , post , thread ) but after restore I still got database problem , those tables have so much colum not like default .