[bemfica]

First of all, I know this has been asked many times in a few different ways, but I've searched through all these threads and had no definite answer.
So here's my case:
1. When I first realized my kindle wasn't opening KUAL I was on the middle of a 5-day road trip with no internet signal, so I couldn't get instructions properly;
2. Since I didn't know it was just a matter of reinstalling the files (actually I kinda knew, but without internet I wasn't able to get the step-by-step instructions to do so), I tried full reset before finding out the ".bin disappearing" issue wasn't related to a corrupt file I had downloaded or anything like that;
3. So here's the question I couldn't find the answer for: considering my PW3 was jailbroken before, but I did a full reset after the update, is there any chance I can re-jailbreak it, without having the backup for the KUAL/MrPI/etc files and folders?

Thanks in advance!