To find the updates that are applicable to your content, do the following combined search:
Location=Local
Out Of Date=True
Once the results appear, select them all, then do View Asset Versions. Once that box appears, click View in Main List.
It is advantageous at this point to add an extra search term - Location: Download Station.
You can now select all the items again, then right-click anywhere in that selected list and click Download.
Note - If you do not have a First Class Ticket, you will run into problems when updating content.
Also note that some updates may not function correctly in-game, due to faulty fixes. See the DLS,FCT forum for more details on that.
Also, you can select individual updates by using the Ctrl key on the keyboard when selecting updates.
Shane