Hi ed - you can name your template file template.3dm if you want, but you have to put the entire filename including drive, path, etc... like c:\some folder\template.3dm in the options dialog if you just type the name in directly.

If you just enter in only "template.3dm" as the filename, it won't know what folder to go find it in.

When you use the "..." button it will fill in the entire path for the file you pick though, so it's easiest to use that button for setting it.

- Michael