I have a Vanilla server that I changed to Snapshot 22W42a. When I try to change it back to Vanilla it pops a "reinstall" warning and if I reinstall it, I get a fresh world. How do I change it back to Vanilla without deleting the world. I created a backup, but only after I switched to Snapshot software. I upload the backup but then I'm back to square one. Am I missing something or is my server stuck on Snapshot software? My concern is that I won't be able to keep playing this server once 1.20 comes out.
Any help is appreciated. I'm kind of new to this.