According to Code Mystics (the developers who implemented the rollback update), this GOG version is outdated because of a decision between SNK and GOG. So if you want the rollback update and/or possible future updates, buy 98UMFE from steam. I love GOG but this is truly disappointment. ref link: https://steamcommunity.com/app/222420/discussions/0/3113669113506136674/?ctp=17#c3154202142453643726
