Glad you like the system!
Button Shy has picked up the system for publication as AdvanceQuest, so right now they are the ones who have the license. However, Button Shy and I agree that it's fine for fans to create their own adventures and content as long as people are just sharing it as personal work, it's offered for free if shared, it includes a credit linking it back to me and the system, and it does not include any racist or otherwise offensive content.
If you do end up creating something, message me so I can check it out and send a message out to my followers.