So the Steam version only supports 64-bit operating systems. That may be it. You can hit Win+I then go to System > About. Then there should be something like a “system type.” If this is the problem, you may just need to try to refund, I don’t plan to add a 32-bit game version to Steam. If you aren’t able to get a refund, let me know, I’ll try to see if I can help you from my end.
If it’s not that your system is 32-bit, please let me know that, too. I’ll continue to investigate in that case.