So why do I pay 5 USD for it ?
Beacause that's what it costs? System requirements is clearly stated. What you have done is like buying diesel for your gasolin driven car and whining about it won't start.
That's a pathetic excuse! EVERY OTHER RELEVANT piece of software in the WORLD has updated to Windows 10 YEARS AGO, and for some unfathomable reason, your company hasn't?????? WHY???
And for the record your example is a poor one. It's more like selling a car that INSTEAD of running on gasoline, needs some old outdated fuel, and then saying, "Sorry, we forgot to mention that our cars don't support gasoline." But now you're stuck with the car, and no way to run it. MOST of the world uses Windows 10 now. So this lazy company either needs to get off their tails and update their software, OR TAKE IT OFF OF THE NET.
I was all too happy to give this company my five dollars, UNTIL I read this thread. Now, I no longer have any respect for this company, and would NEVER give them even a quarter after reading such disdain for them customers. It's a shame such a nice piece of software came from such a apathetic company. It deserves better, and so do we...