Hi,
I have the same problem. But first i´ve received an error by installing showing this:
"error copying file from packed archive ib:/dist/TBM900 to D:/SteamLibrary/steamapps/common/X-Plane11/Aircraft/X-Aviation/TBM900/plugins/systems/win_x64/systems.xpl"
Then I entered X-Plane, do the activation. It says the license is updated. No knobs are funtionally.