As mentioned in another of my posts, I'm a huge fan of your sim, and it is the reason I'm able to fly as well as I do today.
I am volunteering with our local Civil Air Patrol, and they are starting up a drone racing program. I recommended your simulator to help the kids get started, and also offered to buy the 4 licenses for their simulator computers. I went to install them yesterday, and I couldn't figure out a good way to pay for 4 additional licenses without signing up for a new account or something. Do you have a paypal I can donate to? Or what is the best way for me to send you the $20??