You should at least try to convert to the 2013 version since you don’t use any online services or download transactions now. Starting in 2014 they instituted an ID password to get into your own data. I’m staying on 2013.
You can download 2013 for free (I think it's the Deluxe version) using this how to convert article. It’s under Converting from Quicken 2004-2009.
https://www.quicken.com/support/how-and-when-use-intermediate-version-convert-older-versions-quicken