I was wondering if someone can tell me how to save a cutout template that I created, like the Der Der.tbt that came with the program, so I can add it to a proect I created earlier without having to recreate it all over again.

Open the Library-Window and click the Global-Folder.
(maybe it is a good idea to create a few subfolders first –
like “Characters”/ “Animals” /”Houses” / “Trees”…aso.)
Right-click the Global Folder and choose New Catalog
and give it a name.
Highlight one of your new Folders and drag your drawings
either from the Timeline or the Exposure Sheet into the
Library Window.
When you close down Toon Boom don’t forget to click
Save changes to Global Library.