Thanks for the helpful responses.  I didn't know this forum existed and just discovered it a couple of days ago.  I am the original "poster" - but I didn't post it.  I sent an email support request with this question - I didn't get an email reply, but my question was posted here.  That's fine - I just didn't know it would happen.
There is so much about this telescope that isn't "officially" documented.  I have been viewing YouTube videos (most old) to get help.  I have also used an "AI" Chatbot (Perplexity) to get help - but that is not reliable.  I asked Perplexity about the output files - and it said "JPEG, TIFF, and FIT".  No TIFF files on my system.  So I asked Perplexity why  and this time the answer was "There has never been any TIFF output".  I want something more robust than the jpegs to post-process and I am used to TIFF files for my cameras.  I assume I can convert the FIT files to TIFF.  It's an adventure!
David