Works for me. Using Reloaded version, English.
All that I have to do is start a game, use one of the piles/cabinets around your building and enable the trainer. Then add as many items as you need to your stockpile. You can do this quicker by dragging items to and from the location you are looting, such as dragging 20 wood in your stockpile to the 4 in the pile to have a total of 24 units of wood in the pile of loot. Just keep exchanging the items to and from your stockpile and the pile of loot until you have the amount desired.
I also don't do scavenge runs the night I do this, to ensure the game saves in case of a crash.