Not sure exactly what you are asking but probably, YES!
You can't edit the recorded clips to play in the software but you can delete individual clips that you don't want to see any more.
Firstly, do you know how to find your way thru your computer's files? (Some people don't).
Normally on installing the software, it installs automatically to your 'C' drive. Then any cards you purchase should be installed somewhere close on the 'C' drive unless you manually change the storage location in the software (GUI).
With 3 cards, I'm guessing it's the former. Ok. Don't know your version of Windows but you need to dig down thru, C:\users\Your Username\AppData\Local\vghd\models.
In this folder, you should see files called 'exxxx' or 'fxxxx'. These are where your clip animations are stored. For previews of unpurchased cards, you can then open and delete the files you don't want. Without a full clip player, this will take trial and error, playing each clip to decide if you want it or not. If all gets screwed up, you can always delete the whole preview folder and download it again.
There's probably more you might want to know so feel free to ask :)