I just bought some DLC for Train Simulator, but after completing the purchase I skipped to another page without starting the download.
Now the DLC shows up in my list of DLC as "not installed" (in Dutch, so I don't know what the exact English wording is), even though "install" is checked.
Unchecking and rechecking "install" didn't do it either.
How do I get Steam to download and install it?