This may be a stupid question, but it's not clear to me how templates are supposed to be used.
The documentation says this:
"Templates are “freeze dried” Hype documents – opening a Hype template creates a new document based on the opened template. Any document can be saved as a template by choosing File > Save Template. Once created, templates cannot be edited. Thus to change a template, you’ll want to create a new document by opening that template and then save over the old template by choosing File > Save Template."
This doesn't seem to be the case though. If I save a file as a template and then open it again (via file - open), it behaves just like any other file (apart from the different file extension). I can still modify it, and I can still save to the same template file.
The only time it does work as advertised, is when I open the template with file - open recent, in which case a new (untitled) file is created.