Hey there,
just tried to set it up on a fresh KSP 10.0.1 install (after downloading the recommended version of all mods), but it is failing with the "XYZ not installed" messages and eventually hangs at the loading screen.
First of all there's an exception at the very start, but that comes either EVE version 1802 - removing EVE fixes that, however it still causes the "not installed" messages and the infinite loading screen.
From a quick look at the KSP.log it seems to me the path to the GameData folder is not correctly constructed by the install checker?
[LOG 19:07:26.874] [BICH] GameData directory is /home/xyz/.steam/steam/steamapps/common/Kerbal Space ProgGameData/
which should be: /home/xyz/.steam/steam/steamapps/common/Kerbal Space Program/GameData
Full log follows:
[Giant log file in spoiler removed by moderator]