same for me, after uninstall and reinstall (steam version), only 96gb are downloaded.
Into content manager, there is nothing to toggle, nothing to download, only 2 planes, no airports, no cities, no challenges, etc…
everybody says “toggle all → download” , but there is nothing to toggle !!!
im using the steam version.
installed in D: drive.
i tried many times to reinstall and still the same issue, im loosing faith… 
i deleted all folders, files. everytime i try to reinstall from steam, there is only 96Gib of data. Wich is not correct i guess.
