Allround's support was able to help me. Last week when I was customizing directories, I inadvertently changed the Templates' default directory which made all the program window types "disappear."
Many thanks to Marco! :D
I started up Developer this morning and found that when click the sequence
File->New->Program Window
instead of a list of program window types, the only one displayed is called "Blank." Where are all the others?
A suggestion would be greatly appreciated -- the sooner the better. Thanks!