xDeadPixelx

I can't find help anywhere on the internet with this problem. I've been playing on a single player world with the tppi mod pack for a few months now and it was working fine. A week ago however, my world started having issues on the load up. Only a few chunks (5-9) would load up around me and the world would begin to lag. The problem does not go away if I wait. This still occurs with small render distances and 5G ram. I have to keep reloading previous saves in extra folders and it's really annoying to lose a whole day of work due to the issue. This has happened multiple times and I haven't found any fixes. I know this is in an odd place to post this but the tppi forums are dead. Any input would be greatly appreciated.

I just downloaded the technic launcher a couple of days ago and got the attack of the b team modpack. I played the pack for the last few days and did a ton of stuff, but when I went into the technic launcher this morning the modpack wasn't installed. I reinstalled the pack only to find that my worlds were gone. It's not in any %appdata% folders and I don't know how to find it. Please help.