Hi, I have stumbled upon the same issue with the .msix packages not recognised in my Win10 OS (btw I did comply with the specs).
For some reason, I could not even install App Installer from the Microsoft Store. Eventually this is how I managed to install the Affinity packages:
- open Powershell as Administrator
- type the following: ADD-AppxPackage -Path <filepath>
- substitute <filepath> with the full path to your installation file (e.g. "C:\Username\Downloads\affinity-photo-2.0.0.0.msix")
Voila. Hope it helps!
Cheers.
S.
