Need help with batch processing Avidemux for OS X

[SetoTitan]

I have numerous AVI files that have 2 audio tracks, I want to remove 1 of the audio tracks, save it as MP4 and correct the 500ms audio offset. Usually I use Handbrake and thats the only program I really know well. However for some reason you can't batch remove audio tracks with Handbrake, it will do the first one properly then default for the rest. Apparently it's a known issue, or "feature".... but I digress.

My point is I'm coming as a total n00b to Avidemux. I'm trying to figure out how to make the changes I described to all the files in a folder in one quick batch. I've got so far as to generate the below Project Script, but I don't understand how to run it. Can anyone with experience assist?

#PY  <- Needed to identify #
#--automatically built--

adm = Avidemux()
adm.loadVideo("/Users/Me/Desktop/ATHF_S1/ATHF-S01E01.avi")
adm.clearSegments()
adm.addSegment(0, 0, 1290872916)
adm.markerA = 0
adm.markerB = 1290872916
adm.videoCodec("Copy")
adm.audioClearTracks()
adm.setSourceTrackLanguage(0,"unknown")
adm.setSourceTrackLanguage(1,"und")
adm.audioAddTrack(1)
adm.audioCodec(0, "copy");
adm.audioSetDrc(0, 0)
adm.audioSetShift(0, 1,500)
adm.setContainer("MP4V2", "optimize=0", "add_itunes_metadata=0") 

[SetoTitan]

I pieced it together from the below video, good luck to everyone else attempting to do the same.

https://youtu.be/pxMeIU-ghXY