In XDPX, you have:
Recent files
The File menu shows a list of the most recently loaded or saved files in its 'Open recent' sub-menu. This list gives a quick way to reload any of those files. This option lets you change the number of files listed (between 1 and 20 files).
The default number of Templates is probably linked to the same code.

To increase beyond, I set up default .XAR files and have them in a quick access folder and I just drag onto the Toolbar area, remembering to immediately Save As for the current design.

Acorn