SSFIV:AE - Backing up DLC on PC?


I have Super Street Fighter IV: Arcade Edition for the PC. I’m interested in purchasing some DLC but I’m afraid that in a few years maybe Microsoft will shut down GFWL due to it’s lack of success (debatable) but I wanted to back up the DLC as a preventative measure so that I will always have access to the DLC I purchased. Is there any way of doing this?