Metroid Fusion Forum  /  Using the Savestate packs

I am trying to use the Any% JP savestate pack to practice with VBA 1.8.0 beta 3, but it is not accepting the sg1 files, and crashes when I try to change them to sgm files.
Any ideas on what I might be doing wrong? There isn't a lot of info online about the sg1 files.
Thank you.