helloI download the beechcraft 1900c express and i don't found how can i set the course on the VOR2 instrument.thanks

I believe (not being at my FS pc) that the number two nav is displayed on an RMI. This is not pilot "settable". The head of the needle will always point to the station (and the magnetic course to the station), and the tail of the needle will indicate the VOR radial you are on. So, rather than turning a knob and waiting for a needle to center, you turn the plane and wait for the head/tail to indicate you've intercepted the proper course/radial, and then you fly so the needle stays on that course/radial.Google Radio Magnetic Indicator (RMI) for more info.

curious if someone can tell me how to un-install this aircraft from my computer? I've looked in the control panel unistaller and it is not there! does PMDG offer a removal tool?

No - as far as I am aware there are no registry entries.