cant export images from tpl files

I have a trial version of STB pro 5.5
I can open storyboards created in 4.1 and work on them, and also export the images as bitmap.
I also have a library of .tpl files created in 4.1 but once opening these I cannot work on them or export the images, but rather my pointer has a white circle with a diagonal line.
Hope you can help

Thanks a lot