I am trying to load a .user file I I created with the editor. Unfortunately, I can't. Whenever I go to add it to the hero setting on the Configure Hero screen, the User Sources checkbox is grayed out, saying no user sources defined. I have saved (obviously) the user file as well as tested and compiled the file within the editor with it saying the spell (currently the only thing in the file) ready to use in HL. I have tried restarting HL (a few times) but with no luck. Am I missing a step?