MacOS This should solve it: Try authorizing it in Settings -> Privacy & Security. If that doesn't work, you can try openning a terminal (command + space, type in terminal, hit enter), then run: chmod +x PATH TO APP.app/Contents/MacOS/LustsCupid.app Once you've done that, you can try again to do the usual Settings -> Privacy & Security.
You can join on our Discord so we can help you faster: https://discord.gg/MVkMN9jG
And Itch offers refunds. You need to contact support for that. I hope this helps!