Your X-Plane folder is inside of a "Program Files" folder which Windows is probably protecting.
This means the X-A activation process cannot save your license file, as indicated by this line:
0:03:15.850 G64: debug: Toast Message:(type:error) (X-Aviation Licensing) / (Could not save license data.)
On my own system I have D:\SteamLibrary as the root folder for my extra steam content. Not D:\Program Files\
Here's a quick google result on how to move a steam app to another drive/folder:
https://www.howtogeek.com/269515/how-to-move-a-steam-game-to-another-drive-without-re-downloading-it/#:~:text=To move an installed game,library and select “Properties”.&text=Click the “Local Files” tab,You're done.
Please avoid the temptation to run X-Plane as administrator to override the Windows protection of your Program Files folder.
Let us know if you need more help.