I think that’s the same one from this page: https://www.reddit.com/r/StreetFighterMods/wiki/index
Use the yattamm program, it’s super easy.
Just download the 1 round mod, and any others you want (skins, music mods, etc).
Open up yatta, find the mods and load them into the program. Run the mods from the program, start the game.
Easy peasy. (lemon squeezy)
Keep in mind that at least one mod is incompatible with others (it’s the portrait colour mod, pretty insignificant)
Should be safe.
It worked perfectly me for me the other day. Used it to smash all difficulties of survival with the four dlc characters.