Sure! Backups on Windows are in C:\Users\(yourUserName)\AppData\LocalLow\Moon Studios\NoRestForTheWicked\DataStore, in folders with numbers. Each folder is for a particular build of the game.
I went into the folder of the latest updated realm, copied character saves in a separate folder just in case, then deleted the “main” save and removed the “bak” from the latest backup file’s name.
And it worked!