Hello! I am really flattered that you'd go out of your way just to ask how to play this game. It means a lot to me!
To answer your question, first extract the folder named "Interrogation 091 v1.0.0" anywhere you'd like (e.g. your desktop). After that, just open the folder then launch the application/exe file called "Interrogation 091". Then you'll start playing again!
I'm not sure what was the issue in your case, I can only guess. But I hope this fixes the issue. Thank you! <3