Koreader crashing on kindle

[phia]

Hey, this is my first time posting, so i hope I am doing this in the right place.

I have a Kindle, (KT4, still on 5.13.6) that I installed Koreader on a few months ago. It worked fine for a little while, but eventually, Koreader would start crashing randomly, and I would be forced into the reboot screen, with the tree and have to wait through a progress bar. I have re-installed koreader, but have not yet factory reset the whole device and re-jailbroken it, as I have deregisterd this kindle from my account and would prefer not to reregister.

I do get a crashfile from koreader, that I have attached. I have attached the most recent one, and one of the older ones.

I am truly at my wits end with this, I hope any of you have some suggestion.

Thanks!