Steam again...

Beside I play Steam-Sub Command on my PC, I also 'want to play my Steam-Sub Command in my Camper. In my camper I don't have acces to Internet. Everytime I start Steam-Sub Command the programm insist making contact with Steam.

I thought, Sub Command is physiccaly installed in my computer, I installed Sub Command as well in my PC as in my Laptop, so I can play Sub Command without connecting to STEAM.

What I'm doing wrong???

Thank you,
Easy