Meanwhile updated to ASCOM 6.5 SP1 and SGP .729. Accessing all as Admin user for now while testing these ASCOM Diagnostics vs. Dragonfly issues.
When launching SGP it still launches the Dragonfly software. It also shows the Dragonfly switch now in the Control Panel and always as connected. Impossible to disconnect. In the Sequencer window I can connect and disconnect the Dragonfly observatory (roof).
ASCOM Diagnostics tool still unable to connect to Dragonfly switch or dome, neither as 32bit nor as 64bit. Even with Admin credentials showing the 91 run-time errors.
ASCOM Diagnostics tool able to connect to Pegasus UPBv2 though, both with and without Admin credentials.
Any suggestions on how I can make this work or what I can do for further analysis? Other than the misery of uninstalling and reinstalling the lot. Would like to avoid that if possible.
Will try with an another computer with same astro software setup tomorrow.