Can you switch FC's?

If so, how to do you go about changing?

if you're in a free company; you can open de Free Company button, right click yourself and choose 'leave'.
You can only be in 1 Free COmpany at the time.

It's Main Menu / Social / Free Company...

Then you go to the User section in the Free Company window.

At the bottom left there is a 'leave company' option.

Hope I remembered this right!!!