I just installed the latest MC Pro stable version dated 5/10. Program crashed and now I cannot get it restarted. I have tried rebooting and re-installing; no help. Suggestions please??

How do you make a scalable trapezoid in MatterControl Pro?

Is there a maximum number of subtracts that MatterControl 2.0 allows? On some object designs that have multiple subtractions already, when subtracting another object from the main part, all that is left is the part(s) I wanted to subtract and not the main object after the subtracting. I am selecting the correct item to subtract.