Bantry Thanks for your help. I've resolved my issue, mostly, as I've successfully loaded slightly older saves. For some reason, my two most recent saves still crash, even with the correct use_fixed_resolution_720.txt file inserted in the game folder. Their "autosave" equivalents also crash. It's a scene in the doctor's office.
As I mentioned, I kept trying slightly older saves, and I was able to load a save about a day older, so all is fine as far as I'm concerned. It's still a bit worrisome that my two most recent saves won't load, but I'm okay with it if you're not worried about it. Here are some replies to your other questions in case it's helpful:
Do you have your extension hidden in Windows? Sometimes that results in the added file actually being
"used_resolution_720.txt.txt" instead of the correct "used_resolution_720.txt"
Yes, I am using Windows 10, and no, I do not have my extensions hidden. Incidentally, the "used_resolution_720.txt" file you sent me seems to have a typo or two in it. I think it should say "use_fixed_resolution_720.txt," with use in present tense, and the word fixed.
Actually you never said what platform you are trying to play the game on so I assumed Windows. Nor did you say if you were trying to play the 'compressed' version, which is not supported by the way. Anyway, rather than go through every other question that needs to be answer, try downloading this, unzipping and inserting into the 'game' folder.
I'm sorry I did not supply all the required info. I am indeed using Windows 10, and I am not playing the compressed version. I am playing the vanilla version with no mods. I've always played it this way. I enjoy the game in its "natural" state, heh.
Anyway, I'm good now. But if you'd like me to upload the four recalcitrant save files, I'm happy to do so. Thanks again for the help. I do try to read this thread and the guide before posting questions, and in the future I will be better about specifying what OS and game version I'm using.