Depending on the version you are using try adding tolerances under Arc Filter / Tolerances. If you dont have any tolerances entered it will give you an error and wont allow you to run the toolpath. The Profile Tolerance is maximum distance the smoothed toolpath will deviate from the original toolpath (without the smoothing on). The Offset Tolerance is the distance that any other part of the smoothed toolpath will deviate from the original toolpath. Perhaps another issue is that you have these tolerance too small? Try increasing the tolerances after all its a roughing toolpath and you should be leaving material for a finish toolpath.

At home Im guessing you can pan your graphics across the screen. You want to set the default setting to dynamic rotate. To do this go to the Menu Bar. Choose Settings, Configuration, and then, Screen and then about 3/4 of the way down the configuration page you should see Middle Mouse button/Wheel use. Change that to Spin. With the settings you currently have you can also hold the Alt key and push down on the middle mouse wheel and the part should rotate for you. Hope this answers your question.