Can not open projects in Simulator

I installed Corona SDK on another computer,probably several months ago. Have not gotten back to the project and just installed the SDK on a laptop running Vista.

I can launch Simulator but when I try to Open a Project (.lua file) I get a Windows message saying “Corona Simulator has stopped working” (see attached image). I get the same results on ALL projects (tutorials, samples, etc). I did not have any problems on previous installation, although it should be noted I was running Windows XP on the other computer. Sadly, upgrading from Vista is not an option at this time

Any ideas? 

Thanks in advance.