Hi Sadsid,
Not sure what you mean?
Ship Sim Extremes is listed in the library, but the only way I know to access the DLC is to right-click on the game name and select "View Downloadable Content". However, this only lists what you have installed but does not give you the option to uninstall.
It states the following "All downloadable content is automatically installed and uninstalled along with the game, and can be accessed by playing it".
I cannot see any way to uninstall a single DLC item. It seems the only option is to remove the lot, which seems a bit extreme (no pun intended).
I'd be grateful for any tips you might have.
Cheers,
Boneman