Oh good! I haven't had time to play so I haven't started day 4 yet. Now I don't have to start over again.
edit: Okay, ugh, sorry to have to keep reporting problems.
I am able to open up my save now without it crashing. However, the place where I saved comes up in Japanese. I'm pretty sure that's during Day 4. I skipped through it and finally came to an English section, it's when Rika and Mion are telling Keichii about Rena's name (I'm not sure what day that is). So it seems like part of the translation is missing? Also, I cannot pull up the menu now (neither by right-clicking or by hitting escape). I also tried reviewing the text the minute I loaded it to see what was right before the save and couldn't, but that might just be a normal aspect of the game (not being able to review text prior to a save).