Were you able to download from the link that Rick B posted? It worked fine for me.
The initial adjustment procedure is at the bottom right of the first (English) page. Says to adjust to a level of 6.0 manually when stationary.
Also, I thought I would mention a problem I had first time out. The trailer brakes
seemed too sensitive and were grabbing. I felt it was pretty dangerous, it was night time, and we were having a problem finding a place to overnight. By hacking around, I managed to solve the problem. Next morning, reading the manual carefully, I realized that I had turned on the boost feature accidentally!
Thought I would mention this just in case your setup shows the same symptoms so you will have a place to start looking!