Update is a mess

The new update is a mess. Its extraordinarily glitchy and crashes constantly; I am a huge iMovie user and I loved this app before this update. This absolutely blows. Im scared to even open any of my preexisting videos for fear that they might be ruined if I do.
FIX THIS NOW and Ill give 5-stars (for the few minutes that the the update WAS working, I noticed they fixed the problem with moving sound... not that it really matters now because I cant even do anything).

Spencer Ace about iMovie, v2.2.2