Oh, I'll first try it on my old MacBook (MacOS 10.11.x) and see if it works there - if it doesn't work there, I'll just consider it a nice little donation for your hard work still. I know it's always a learning process, so I don't mind the 5.x €
But since I'm following you anyway, I try to give some feedback on Demos to help you find bugs or problems.
I'm almost certain, given some time, I might even find a WINE-configuration on Linux, that will make it work. - Just didn't have the time and "muse"/inspiration to fiddle with it last night.
So, it's alright from my point of view, but if you feel better with it, I'm not denying a gift on my birthday ;-)