So just a few days ago I bought offworld trading company and the Jupiter's Forge expansion pack was included. I didn't really want the expansion, but I was opposed to it either, that said what I really wanted was to play the core game that takes place on MARS. Every time I try to launch the game though, it imediately starts up the Jupiter's Forge game. For the life of me, I can't figure out how to start the core game. Do I seriously need to uninstall the expansion in order to play the original?

Running on Window's 10.