You are right EVEgames. It has something to do with the launch syntax.
Someone on the HyperSpin board got me the syntax they use, but it doesn't work for me

.
When I launch Nostalgia, HyperSpin tells me that "Intellivision is an invalid system name or Nostalgia is not supported", even though I have the names and prompts in the autohotkey files.
Love Hyperspin, but hate this piddly crap

!

Thanks.
Eric