ToonBoom Storyboard 1.5 no longer opens

I have Toonboom Storyboard 1.5. However, recently I cannot seem to launch the program. I have tried uninstalling and reinstalling but the same problem occurs. I click on the icon on my desk top and the splash screen appears but the actual program does not open. I am also unable to open any of my past projects. Could you please advise? I have windows 7 and no changes have occurred on my workstation since initially downloading this software (June 2012).

Please contact support@toonboom.com for this as they will need to investigate what could be causing this to help you resolve it.