Doesn't deleting all the folders/files in the appdata technic folder delete all the modpacks there, as well? Sorry, having the same problem, hangs at the Mojang splash screen then returns to launch without error, but deleting all other modpacks sounds like blowing up a mountain to get rid of a few moles. Any other less extreme solutions? Have reset the pack, updated Java, disabled the firewall (wasn't the problem), have also tried to manually select the build, but nothing will launch the game. Thank you for any help!!!