Stream DLC Activator

Start the program executable. Read above under Installation if it doesn't launch.
Choose which programs and/or games the program should scan for DLC. The program automatically gathers all installed games from Steam, Epic and Ubisoft directories.
Wait for the program to download and install SteamCMD (if you chose a Steam game). Very fast, depends on internet speed.
Wait for the program to gather and cache the chosen games' information & DLCs. May take a good amount of time on the first run, depends on how many games you chose and how many DLCs they have.
CAREFULLY select which games' DLCs you wish to unlock. Obviously none of the DLC unlockers are tested for every single game!
Choose whether or not to install with Koaloader, and if so then also pick the proxy DLL to use. If the default version.dll doesn't work, then see here to find one that does.
Click the Generate and Install button.
Click the OK button to close the program.
If any of the DLC unlockers cause problems with any of the games you installed them on, simply go back to step 5 and select what games you wish you revert changes to, and instead click the Uninstall button this time.