You can. Whether or not you should will be a decision weighted on factors unknown to us readers.
1 person found this helpful
I recommend leaving the old versions on your computer. They can come in handy when working with someone who hasn't upgraded yet, et cetera.
There are also a few features in the earlier versions that didn't get brough forward into the current version. (One that comes to mind is the ability to work with FLV files encoded with Sorenson Spark, for which you need CS4.)
Thanks for your replies. I had CS4, CS5 and CS5.5. I've now uninstalled CS4. Just seem overkill to have them all remain on my hard drive. @ Todd, you make a good point but I've never needed to work with FLV files so its all good.
The FLV example was just one example. But, if you have no need for the features left behind, then onward and upward. I have CS3, CS4, CS5, and CS5.5 on one of my computers---but I'm in a different business than you.