Yes, the "Script Debugger for Windows NT 4.0 and Later" is what you need.
This component is typically installed as part of various other Microsoft applications such as Visual Studio or Microsoft Office. It is not distributed as part of Enterprise Architect, but is available as a free download from Microsoft if it is not already installed on your system.
Please try download and install the Microsoft Script Debugger from the following page:
http://www.microsoft.com/en-us/download/details.aspx?id=22185 Please Note: Although the system requirements on this page does not list Windows 7 or Windows 8, we have had reports from other customers running Windows 7 telling us that installing it has resolved the problem in their cases. We have also tested this ourselves on a Windows 7 64-bit system and confirmed that it to resolved the issue you describe.