"To upgrade or not upgrade, that is the question..." I'm an occasional user, have been out of the loop for sometime, about to return to a project I started a few years ago in 8.3. I get these offers from Sonar to upgrade for $99, so I'm tempted, but have a couple of concerns: Version 8.3.1.372 is doing o.k. on my system, so I'm thinking, "If it ain't broke don't fix it." If I do go ahead and download X2, will my previous version (8.3.1.372)still be on the computer and would it still be functionable? I might like to be able to go back and forth from the new version and the old version while I'm learning to stumble, fall, and repeatedly trying to pick myself back up with the new version. Could there be any serious conflicts having both programs on the computer at the same time? (I'm wondering if my Presonus might go into some sort of conniption fits). Would the data files created on X2 be backwards compatible with 8.3? (I'm thinking, a big "NO," but would like to hear it from someone who knows the answer for sure). -Steve