Previous saves contradict with the new gameplay, also, I've added scenes for the quests you supposingly have already done, so it might be better to start a new run as many gameplay mechanics also changed a bit.
About missing PNG files - what version do you play? Demo/Paid? Also, do all NSFW show errors?
It might be a problem that you've updated Demo to Paid version and it didn't upload a new files,but I need more context to understand the problem
Only the blowjob from Nao and the breast one works better but the newer one only said "failed to find PNG" whatever that is. Same as Rin old nsfw works but the newer one "failed to find PNG" again and the version I'm using right now is the demo and I download it when it was 0.94 and now it's 0.95. also will it be fix next update?
Also I wish the old saves works instead of the "exception error" :/
I hope you fix this update!
(old saves was at "THE END OF THE DEMO")