Here your working directory will be your Main file directory. Arguments will be relative to this folder. Try creating the folders files_in and files_out before executing the operation? I also copied AnyFE2Abq.exe to "files_in" directory together with all DLLs and other dependencies, as well as the "license.lic" file (it is required and if you haven't copied - it might complain about existing license).
This code seems to work for me. You should see a command line prompt that says something like that:
I apologize for only replying now. Thanks for sending me the code. I tried using it according to your instructions, but it still didn't work. From what I've looked at, it seems that Python isn't installed on the machine I'm trying to run it on.