I was able to download and install the Manager. It told me that I had to install the 300, 310, and the beluga..so I did.
then I quit the manager and tool a look at my XPlane files..Aircraft..There was a folder called iniSimulations..and there were the downloaded planes.. with no apparent version numbers. The planes I had already downloaded were still there in the heavy Metal file..with version numbers.
Hummmmm
So I opened the Manager again and it said I needed to download the files again.. So this is not off to a great start.
Hope you get it figured out.
I am Using:
iMac (Retina 5K, 27-inch, 2019
3.6 GHz Intel Core i9
64 GB 2667MHz DDR4
Radeon Pro Vega 48 8GB
macOS 12.0.1
Xplane 11.55r2 (64 bit)
X55 Saitek Pro Rhino Stick
X55 Saitek Rhino Throttle