Hang in there! The configuration of SGP and the Moonlite focuser/rotator combination does indeed work, and I use it myself.
In the past there was a bit of confusion about downloads, particularly making sure to get the proper ASCOM stuff from Moonlite, and once or twice older versions of the software were on the website than what was actually available.
Although you probably don’t need it during your actual imaging, you might try running the ASCOM POTH utility, and connecting that to the focuser/rotator combination first, and verifying that it works.
Going through POTH will at least get the ASCOM chooser open so you can select the COM ports where your focuser and rotator are appearing, and choose your rotator size, etc. Making sure you’ve identified which COM ports the Moonlite has landed on is important. Digging around the Windows registry may help clarify this. Also be warned that sometimes the COM port names will change. I had this happen during an automatic Windows update and it took a bit of fussing around to debug.
I’m not at the imaging computer now, but could likely find some time over the weekend to walk through things with you and we could compare notes on how each of our systems is set up to try to figure out what yours is still troubled…