Template

How do I add a new template so that it appears in the File menu?

Try putting it on you AppData folder:

C:\Users\USERNAME\AppData\Local\Scrivener\Scrivener\ProjectTemplates

Hope this helps!

Are you talking about a project template? In Scrivener’s New Project window (File > New Project), choose “Import Templates…” from the Options menu button. It will then be added to whatever category (fiction, non-fiction, etc.) it was assigned when created. It won’t appear directly within the File menu, however–the only projects listed there are in the Recent Projects submenu, so I’m not sure what you’re looking for.