DO12 - Help with EXIF rename

In DO11 there was a great script which I used to rename all my extensive photo collection based on EXIF data.

In DO12 it looks like I can load in the prior conversion of:

{shootingtime|D#yyy-MM-dd}-{shootingtime|T#HH.mm.ss}-[#].jpg

Via the favourites 'star', but the new name does not want to convert to the format I want, e.g:


Or am I missing something obvious?

I'm looking to achieve a final file name similar to:

2016-03-26-12.43.43-034.jpg

Ah ha solved it - I needed to clear the 'Old name' field.