Thanks for the solution, it worked!
In Windows Vista I found the programs.lst file in the path shown below. It was the last item in the folder. I think it may have been a hidden file that I didn't initially see so I went into the Windows Folder Options and set it to display hidden and system files. Here's the path to programs.lst
C:\ProgramData\Cakewalk\Dimension Pro\Programs
I renamed the programs.lst file, then launched DimPro and clicked on the Programs list and in a few seconds it refreshed and generated a new programs.lst file to reflect the changes I made to organizing programs and folders.