Yesterday, I decided I'd take the plunge and sign up for iTunes Match. I'm running on Snow Leopard 10.6.8 and I updated my iTunes to the latest version. However, when I click the 'Add this Computer' button for iTunes Match, it crashes and quits iTunes almost immediately. On some occasions I get to see a split second of the first step, but mostly not. Naturally, they took my money so I'm feeling like I've wasted $40 dollars and I'm not happy. I've uninstalled and reinstalled itunes 3 times now and deleted all those 'com.apple.itunes.plist' files wherever I could find them, but to no avail. 

Also, not sure if it's a coincidence, but when I turn on Genius, the same thing happens, and has been happening for the last couple of updates… I tried Genius on my work computer which is running the same Snow Leopard and iTunes versions, and no problems so I'm quite lost as to how to fix this…

Any help is appreciated!! :)