Board Thread:Questions and Answers/@comment-2601:2C4:8100:7D9D:84C9:1003:8F60:3DD2-20190104154838/@comment-27713488-20190104212527

There should be a registry key that points to the RTP folder. If it's not there, you could create it, but it would probably be safer just to completely uninstall and then reinstall the VX Ace editor. Messing with the registry if you don't know what you're doing is not advisable.