Apparently there's been an issue with the game crashing if you try to load a previous state. Since there isn't a bug report screen, this is likely due to the change in episode/season unlocks I mentioned when releasing season 2. 

Unfortunately, I have no proper fix for this as it's due to missing variables, but there is a workaround:

1.  Go to the route select menu and select "Extras"
2. Navigate to the second page and select "Codes"
3. Type in "season 2"

This will unlock all episodes up to season 3 with the new episode system, and from there you can go to the episode you were reading through (if you can't remember, the save names have the episode listed beneath)

Explanation (I think)

I used to track which episodes were unlocked with individual persistent variables. Since this understandably balloons over the course of the season, I replaced them with persistent lists. The length and contents of these lists are then used at the end of each episode to check whether you've unlocked a new episode, or the episode select screen

In the season 2 updates, there was a function to check which episodes had been unlocked and replaced them with the new system in hope to transition smoothly, but it seems when I deleted the previous variables in this update, old saves still kept the persistent variables? I'm not sure how to fix this aside from reinstating the old system, or telling people to create new saves from the episode they left off

Then again, without a crash report, it could be for a different reason, and if this fix doesn't work, please let me know. This never showed up in my testing so I'd assumed it was a version clash but if not, I'll see what I can do