1) Navigate to your game folder and rename "OVH - Old Voyeur Hostel 0.x.x.exe" into "OVH - Old Voyeur Hostel 0.x.x.zip", just changing the extension at the end of the file name from "exe" to "zip". If you cannot see the extension of the exe file, go the Folder Options in your Control Panel and go to the View tab. In there, un-select "Hide extensions for known file types" and click okay. You should now be able to see the extension. You can hide the extensions again by doing this in reverse once you have finished with finding the password if that is your preference.
2) Using an extracting application of your choice (my preferred application of choice is WinRAR), extract the newly named zip file into a directory of choice. Please be aware that you shouldn't extract the zip file directly into the folder the game is located as the newly extracted files may conflict with the existing game data if you run the game so extracting into a "New Folder" or any other folder outside the game location is recommended.
3) Inside the now extracted folder, navigate to "\data\scenario\000_Mattina.ks" and rename the file to "000_Mattina.txt" in order to be able to read the game script file that contains the password to activate the cheats.
4)Open the txt file in Notepad or any text editing software of choice (my preferred application of choice is Notepad++) and navigate to the 8th line where you will find this "exp="f.Stocazzo='dudu'"". Another way is to search for "Stocazzo" using Ctrl+F.
5)The way the game is scripted is such that the game developer set the password identifier to be "f.Stocazzo" so the password should be "dudu".
6) So unless the developer changes the the identifier, and/or the location where the password is set; searching for "f.Stocazzo" in the file "000_Mattina.ks" even in future versions of the game should yield you the password.
7) I deleted everything in the extracted folder once i was done as it served no purpose and took up space but that is up to you. Remember to rename the "OVH - Old Voyeur Hostel 0.x.x.zip" from ".zip" back to ".exe" as you will not be able to run and play the game otherwise.