I bought a module from DM's guild that says it is a Fantasy Grounds module. When downloaded it created .mod files in my Downloads folder. I've tried adding them to the "Modules" folder of my FG files. I've tried adding them to the "Vault" folder. I've tried opening FG with them still in the Downloads. How do I get them to show up in the Modules Activation panel in FG? I'm on MacOS, if that matters.