Honestly, this was my first time playing it, and I played through the entire thing, so I know now to do the new degradation routes first.
I'm a completionist, but actually skipped most of the dialogue in the DG routes because I didn't personally like them in comparison, as I tend to go the "good guy" route in these kinds of things, yet understand why they're there, since, to me, it makes the loving routes have more impact after knowing what an asshole you can have him be.
But yeah, I really enjoyed it, and intend to keep up with it, even if I'm not in a position to donate to this little gem.
Still, I'll keep looking for more bugs, glaring typos, etc., to try and help you not have to do as much work in those cases.
Speaking of: I'm pretty sure others have already pointed out that revisiting the scenes with Patty at the pool party in the "Spank Bank" leads to an error, and I think the problem might "simply" be that it's searching the wrongs folders for the images, or the file/folder names may be incorrect by a letter, number, or symbol, even possibly an accidental extra space somewhere in the code used to find said images.
I've only ever dabbled in coding, so my knowledge is limited, but I thought I'd just offer a few suggestions on where you might want to look before just rewriting whole sections of code, in case you're having trouble getting it to work right.
Like I said, before: I'll keep looking into any problems, and see if I might be able to help you come up with ways to fix them.
You're doing good work. Keep it up. ^_^