Zalya, I don't know if you've tried this, but often after I've updated and the client starts crashing on startup, nearly always, this works for me:
Throw away your PlaneShift folder in application support. It's usually here: Libray/Application Support/PlaneShift
Or better yet, what I do is just move it out of there because it has a lot of personal settings that wiil be lost when the client rebuilds a new folder.
If the client does start up after you move that folder, then problem solved. You can then put back things from the original moved folder that you don't want to lose and restart the client again. Most often, the file that has caused me to crash on startup is the planeshift.cfg. I usually move just that file out of there first and try before moving the entire folder.