I've got the same issue at sushi4u.
Tegrasmash and payload loader both freeze when I try to use the emummc lockpick rcm app.
*edit* I'll add some more information. I'm on 3.0 stock and 8.1/Atmos 0.9.3 for emummc. Running the regular lockpick_rcm works to get my 3.0 keys, the file you posted...