Fade in and Fade out grayed out, don't work

Nothing has been automatically updated about Audition CS6 at all, and it never will be. All Audition developments result ultimately in new releases, and that is where all the maintenance goes - there's no looking back. What this has the effect of is to make no single release 'complete'. If it was ever declared as 'complete' then under the remarkably stupid Sarbanes-Oxley legislation (think back to Enron), then Adobe would have to register it as such, and that costs a fortune. It was from this that the rolling development program was developed - simply to save money. Of course it also gave rise to the 'rental only' concept - which is presumably why you won't upgrade; CS6 was the last version that you could apply a perpetual licence to.

As for your particular issue, go to Edit>Preferences>General and take the check out of 'Show HUD for Selection Ranges only' and it should be back to the way it was. If you don't do this, then you'll end up with greyed-out handles unless you make a selection.