iTunes crashing like crazy after update

The latest iTunes update which my iMac downloaded last night through Software Update results in iTunes instantly crashing each time I go to open it!

Hugely frustrating, I reverted back to a previous version (downloaded from a jailbreaking website) and the issue STILL remains, some file left from the new, corrupted iTunes is on here still?

Theres mention of it on the Apple Support forums

https://discussions.apple.com/community/itunes/itunes_for_mac


Any other Verge readers struck down by this issue?