Is this thread now obsolete? If so, then the title is confusing/misleading.I agree, it is confusing, but technically it is correct.
You do not want to use ASCOM Platform 6.5, but you do want ASCOM Platform 6.5SP1, which is now available on the ASCOM website. I must have either missed the announcement email, or someone silently made it available.
Author of PEMPro
Author of APCC (Astro-Physics Command Center): https://www.astro-physics.com/apcc-pro
Author of Astro-Physics V2 ASCOM Driver: https://www.siriusimaging.com/apdriver