Microsoft Store is simpler.
But the real key is, when you get to the content install, whichever version you bought, do NOT accept the default with that ridiculously long and unmemorable hex GUID in the pathname.
I chose a custom folder, and my files are in f:\flightsim. (F: is my drive devoted 100% for flight simulation stuff; MSFS, DCS, IL-2, P3D, etc.) Just substitute whatever drives you have in your system.
It's so much easier to go to F:\flightsim\community to install your add-on stuff than to find C:\Users\[Your User Name]\AppData\Local\Packages\Microsoft.FlightDashboard_8wekyb3d8bbwe\LocalCache\Packages\Community
One decision while installing will make your life SO much easier.