Problems Exporting With Wall Worm in 3Ds Max

I installed Wall Worm for 3Ds Max in order to export .mdls, however it never works. I always get the error “Can’t Find Steam App User Info.” That pops up and then it says it exported, but it only exports a .smd and a .qc, not the .mdl itself. The .qc also appears to be blank. Please help!