Then there is either something you haven't done, that's the end of your current version or their has been a script error so you'll have to completely restart your save, the coding in the game itself is pretty sloppy but you can't expect much from this dodgy creator.
Viewing post in School of Lust v.2 is now available! comments
Honestly I don't remember where i got mine but its a complete version with everything unlocked. if you're really all that worried about searching around for the file without virus maybe have a look around forums. Either way as long a you have a strong security program and know basic function with computers viruses and maleware it shouldn't be too hard. but like all leaked stuff always be prepared for it to be a threat to your device.