Pro upgrade doesn’t work – Harmonium Plus HD Review

Nice sounding harmonium for free version except the pitch is off by one half step. The c key plays c# for example. I paid for the upgrade pro features and none of them work, I do not get the extra octaves and I can not adjust the pitch, fix the free pitch or adjust the sustain amount. When I click on pro settings after getting the upgrade the screen is just blank.
Review by gotopaz on Harmonium Plus HD.