I had the same problem as you but this did the trick.
You need to add [Launcher] bEnableFileSelection=1 at the TOP of the SkyrimPref.ini that is in your My Games folder (C:\...\My Games\Skyrim), NOT in the installation folder!
this made all the difference. moved the [Launcher] section to the top of the file and it started working. thank you!
Help: Skyrim "data files" unclickable
in Skyrim LE
Posted
this made all the difference. moved the [Launcher] section to the top of the file and it started working. thank you!