Hi, Milkshake. Unfortunately they were not able to help me restore and they weren't able to tell me why the issue happened in the first place. I work for an IT firm so I was able to restore the "20i" files from our server backup and confirmed with my end-users that they could see the restored files in their Proseries clients. 

Are your Proseries data files hosted on a server? If so, you/your IT team might have to go in and restore from server backups.