[Users] Where is the "forward" template?

[Bruce Bowler]

Windows 7, claws 3.10.1, everything worked last week.

Something's happened and when I try and forward a message, I get a popup 
that says

"The body of the 'Forward' template has an error at line 5."

Poking around the file system, I find the folder called 
c:\blah\appdata\roaming\claws-mail\templates, but there's nothing there.

Any additional clues as to what to look for to solve the problem?

Thanks!
Bruce