You're on a site dedicated to WoW addons, I think that the general idea of updating addons is understood.
If addons are causing a crash on your loading screen then you either a) are using too many addons, causing a lack of RAM memory which would be very unlikely; b) using a broken addon which should either be updated by yourself if a new version is available or by the author.
Try deleting your WTF, Cache and Data/Cache folders also (make backup of the WTF folder).