progeCAD 2011 Professional Stopped Working with a blank White Screen. What is the Problem

Please check the following points:

1.  What is the anti-virus software that you have installed?

2.  There is a chance that a particular software is acting on the progeCAD start-up process stopping it.

3. While installing the progeCAD software,  whether the anti-virus/anti-spam software deactivated or not?

4. Do you have any other particular software active when you start progeCAD?

5. Are you able to start the progeCAD software with your anti-virus/anti-spam softwares deactivated