Based on Esther's success on updating the mac version I reckon on installing over the weekend, when I have time...

On OS X, I make sure I've got a recent Time Machine backup in advance these days and... if things don't work out... a fairly straight forward restore of the "Applications" directory and the relevant sub directories within the "Library/Preferences" and "Library/Application Support" directories (think offhand that's everything) usually does the trick...

;-)