The Launcher only reads the first dcdb0.dbc
For some reason, it completely ignores the rest, and the dcdb0.ebc

For those of you who are trying to delete stuff from the launcher, I suggest you try this method.

1- Back up your DCCache folder (in case you change your mind after the process)
2- Move all your dcdbx.dbc to your desktop and proceed as follow.
1- Move the dcdb0.dcb back into the DCCache folder.
2- Start the launcher.
3- On the installed content tab, uninstall what you don't want in your game anymore.
4- Close the launcher.
5- Remove the dcdb0.dcb file from the DCCache and store it in a safe place.
6- Move the dcdb1.dbc in the DCCache and rename it to dcdb0.dbc
7- Start the launcher and proceed with step 3 and 4 again.
8- Once you're done, don't forget to rename it back to its original dbdc number (in this case, dcdb1.dcb) and proceed the same way for all the .dbc files.
9- After scanning each file individually, just move your cleaned dcdb files back in the DCCache folder.
Voila!
I hope I explained it clear enough. If you have any question, please let me know