Ok, so here's the prob. Iv'e been playing FTB for HOURS. I had a pretty cool house built, and had alot of materials and machines. So then, I have to go to the grocery store with my Mom. When we get back, I open the FTB Launcher, chose the Ultimate Pack(Which is the one I have been playing on.) and clicked launch. But instead of launching, it said Downloading Mod Pack!!!! This has happened before though, the only reason I'm posting now is because I thought I fixed it. Also, I added ALOT more mods and had a world I worked a whole bunch on. I feel kind of pissed to see it all just go. Does anyone know why this is happening? If you do, can you tell me how to fix it?