I am working on an addon and when I test installing it it works just fine, but when I reopen the Blender I get a message saying "JARCH_materials" module not found, even though it is in the same folder. Also why is it when I install it I don't get a remove button on the addon?
It turns out that this seems to be an issue with importing bpy into JARCH_matierals. I changed around the code so that bpy is passed into the function instead of being imported and I got it all to work together fine. This might be since bpy is already imported into the module? I don't know for certain.