This has been annoying me for ages as I have a lot of documents written in the default Word 2007/2010 template and the Word 2013 default styles look a lot nicer.
To change the ‘template’ (it’s not really a template any more it’s now a ‘Style Set’):
- Open the document in Word 2013
- Save As .docx
- Click on the Design tab
- Click on the More button of the Style Sets toolbar
- Click ‘Reset to the Default Style Set’
- You’re done