My experience so far with the non-steam and steam version has been crap.  If the 2 versions cannot not be synced then just pull the steam version  off. All it does is cause confusion.   
I've owned the non-steam  version for years on a different computer. I also have another computer  for my Vive games. Since it was there on steam I decided to download it  and see how it looked with the Vive. The only issue is all the addons I  bought for the non-steam version will not work on steam.    
So I  said screw it, deleted the steam version and downloaded the non-steam  version on my Vive computer. Added the keys and nothing works. Can't  choose instant action or anything.   
After you pay so much money  for their software you'd think they would make it simple to sync up  their products. I have to spend hours reading posts on what works and  what doesn't with which versions. It sure doesn't make me want to buy  anything else from ED. Not impressed at all.