Email template customisation not working

[mwanstall]

Am trying to customise the registration emails generated by flask-user as per the doco: https://pythonhosted.org/Flask-User/customization.html#emails

I have the customised templates stored in /MYAPP/templates/flask_user/emails/ however it is still using the default templates.

All other template customisation (in the /MYAPP/templates/flask_user/ folder) works fine - eg customised base templates and registration form templates are working.

Using Win 7 and Python 3.4.