Here are the comments from the developer:
Hello everyone, I wanted to provide an update to Windows 7 support. After an intense amount of troubleshooting and herculean effort, we have discovered that at least one of our core system files no longer supports Windows 7 (which is no longer supported), which is causing the game to not run. And this core file is essential for the game to operate. Therefore, we will have no option other than to support Windows 10 and above.
The good news is that Windows 10 is FREE and runs the game very well! Plus, we have several options to run the game if someone chooses to stay on Windows 7 (see below).
Windows 7 Support Options:
Run Windows 10 (which is FREE) in a virtual environment on your Windows 7 OS. (Oracle’s VM VirtualBox is free and installs on Windows 7)
Use a cloud-based virtual computer service to play the game. Shadow.tech is a good starting place at $11.99/mo. You can access your Windows 10 computer and associated games from a browser on your Windows 7 computer.
Dual-boot into Windows 10 on your existing computer.
Buy an inexpensive used laptop or desktop with Windows 10 already installed at a local computer store. These can be as low as $75-150.
Their response to a refund:
Hi Xeny, we have refunded your purchase through the Old World Studios website. Shortly after your email ask of a refund we all came down with COVID-19 and it was a tough recovery. Then, by the time we were on the mend, it slipped my mind. My sincerest apologies.
We did our best in good faith to deliver a Windows 7 version, as we have stated earlier in this thread and elsewhere. After MUCH work and frustration on our part, we finally determined it was not possible. What is not possible is simply not possible.
Furthermore, Win7 is obsolete at this point, so it doesn’t make much sense to reverse engineer a product for obsolete OS versions.
We do hope you and other Win 7 users can someday enjoy all the work that went into Riddle of the Sphinx the Awakening, should you decide to upgrade your OS to a compatible system.
God bless you!