For future reference, here's what was wrong. A) I was running the 'sitter.exe' included in the etherdream v2 downloads to keep track of ILDA activity, and it was using the same port as Maxwell is configured to use, and thus was blocking Maxwell (Fix: Quit 'sitter.exe' before starting Maxwell) B) I think there were issues relating to having 32 bit Max installed on my system, but not 64 bit Max installed. The combination of uninstalling Maxwell, installing 64 bit Max, and reinstalling Maxwell fixed the 'Error 193 loading external jit.maxwell' message. This shouldn't technically happen because Maxwell is a packaged standalone with it's own copies of the Max libraries? But it's what worked for me.