Just make a new session at 44.1.
Then in that session go to "import session data".
In that menu choose your old 96k session and hit "open".
Then above the tracks section hit SRC (sample rate conversion)
And then highlight all the tracks as "New Track"
Then hit ok.
All of your tracks wil have been converted and each track will still have its volume and plugs intact, no worries.
-Chris