1. Subscribe to a few addons in the steam workshop
2. (a miracle occurs here, causing the launcher list to become empty -- not sure what causes this but I've heard of a few others having the same problem, I am assuming it's a bug)
3. Unsubscribe and resubscribe to an addon that you are already subscribed to, but with the launcher closed
4. Launcher launcher
5. Observe addon did not appear in launcher list
6. Unsub and resub to the same addon
7. Observe that addon now appears in launcher list