I have one of the Global Sat pucks and it has been working great for years - picks up between 7 - 11 satellites - very accurate. I keep meaning to get another as backup or to run two maps at the same time - maybe it is time. No problem with Win 10.
Your map is now much more visible - click to get to larger and then click on that and it gets even larger - much easier to see the route.
Quick looking at your route - and none of my business - but thoughts you may not have thought of. Sal & Barb sold Hacienda Contreras to the truck stop a guy built next door but Sal's cousin put in about 10 spaces in his restaurant lot (with Sal's help) up in Valle de Juarez near Mazamitla (south of Lake Chapala) - Sal & Barb can set you up there if you are interested.
From Valle de Juarez / Mazamitla we take 15 all the way across to Quiroga and then down to Patzcuaro. Not an easy drive but not too bad either - done it in both directions several times - old style road - narrow with curves - but doable. One big bump in this route is Jiquilpan but I did several example maps in this thread showing the route through Jiquilpan. Quiroga can be a bit tricky too but I can map that town too if interested - depends on rig size.
I see Patzcuaro on your map so assume that is why you are going up the cuota north of Morelia - which we avoid due to tolls among the highest per mile of any we have been on. I am not sure how else to route that section but if you're interested we could try to figure it out - haven't gone that way in years due to that toll.