Using DepotDownloaderMod to manually update your Steam games

Steps 

• Get DepotDownloaderMod and unpack it anywhere (+ install required .Net runtime if you don't have it on your system). 
• Unpack _download_depot_bat-cs.rin.ru.7z (password is at the end of filename after -) with sample depot keys supplemental file to DepotDownloaderMod folder. 
• Get manifests for your game and put them into DepotDownloaderMod folder. Encrypted manifests obtained with SMD will do as long as you have valid depot keys. 
  Manifest files must have default names formatted as {depot id}_{manifest id}.manifest
• Edit _download_depot.bat (game_folder, game_id variables) or _download_depot_crimdes.bat (example for Crimson Desert game with game_id already set, set game_folder var to be full path to your game folder)
• Drag manifest files you want to download onto _download_depot.bat / download_depot_crimdes.bat in File Explorer 
           or 
  Launch the script _download_depot.bat / _download_depot_crimdes.bat from command line with depot files as arguments like
  _download_depot.bat *.manifest

Example

Updating French language pack for Crimson Desert

In this example the game is in "D:\Games\Crimson Desert".

Find where your game is installed and use your actual path

  

Now right-click _download_depot_crimdes.bat in DepotDownloaderMod folder, choose Edit in popup menu, and set correct game_path (game_id is already set to Crimson Desert one in this example script).

Edit to set correct game_folder path

Now drag manifest onto the script (in this example manifest for French language pack depot starts with 3321465 https://steamdb.info/app/3321460/depots/ ) and wait until download finishes. 

DepotDownloaderMod + script with depot keys unpacked, correct manifest file obtained

That's it.