Board Thread:LotR Mod Technical Support/@comment-24958920-20180911215457/@comment-27219153-20180911221243

No, not really. The only reason your UUID would change is if you changed accounts. However, it sounds as though you do not have an account at all and did not pay for the game, in which case your UUID could change for any number of reasons. You should buy the game to prevent this happening in the future.