I figured I would update the mechanics on the post above. When version 6.0.5 came out the game stopped using "workshop.data" to keep track of the Steam uploads. It would check the users blueprints folder and match what was there with the Steam workshop entries. Afterwards, the game went back to using "workshop.data" to track the users workshop entries. I propose having the game check for "workshop.data", and, if the file is missing, match the blueprint folder with the Steam workshop entries and generate a new "workshop.data" file. Maybe a "refresh" button to re-synchronize with the workshop on demand?