Permanently disabling Saints Row: The Third DLC on Steam [duplicate]

I bought Saints Row: The Third PC on Steam with a load of DLC which unlocks way too many things from the start, so I'd like to disable the DLC. I found that this can be done by right clicking on the game in my Steam Library, going to "View Downloadable Content" and clearing the checkboxes in the "Install" column for each DLC. This worked great the first time, but the next time I start Steam I find that all of the DLC has been re-installed and I have to go remove it again.

It looks like some people are using a similar process without the same complaint: Saints Row 3 (The third) Comes with most of the things done for me. This isn't a duplicate, it's a further problem where I disable the DLC and it keeps getting re-installed automatically when Steam restarts.

Is there a way to uninstall the DLC, and keep it uninstalled until I want to re-install it?