Adobe Dreamweaver CS5.5 - Bugs Galore

So we have recently tried to start using Adobe Creative Suite CS5.5 on our new iMacs at work, and it is a complete disaster. Adobe Dreamweaver is so buggy that it can't even open and close without crashing. Once open, it sometimes allows you to close it, and sometimes not. The Preferences menu seems to be permanently greyed out.The Adobe forums appear to have hundreds of users with the same problems - cannot quit, no preferences and Adobe doing nothing. And people wonder why we still use Visual Studio 2010 on our Macs - because it is blooming brilliant in comparison to the Adobe rubbish!