I can't remember where they posted it, but clear the files from 'my documents/cfm'.  I had exception errors every time I clicked the enable/disable tab, but after clearing that directory, it no longer happens.

A first run feature has been added to CFM which will delete your old CFM folder every time a new CFM release is issued.  So hopefully you will not have to manually delete the CFM folder anymore.  But it is still good to know that you can delete it manually anytime you are experience problems.