Hi Gitmesteak,
It is so frustrating. Went to try mine yesterday with SC600 and it worked perfectly twice! Used my saved presets and profiles with no problems whatsoever, I only tried the second print to see whether it was temporary, but worked exactly as my laptop running Catalina with Affinity 2. I hadn’t actually cleared the savings, just thought I’d give it a try, so goodness only knows what is going on unless Apple have tweaked their update. Will try it again to see. Really hope it’s for real, as it’s such a pain having to export out to laptop, and I do love the whole Affinity suite. Hope you also get some luck 🙂