Hey Steven, I just wanted to say going to the last version of Nitro 10 worked. I did not have it beforehand but with your link, I downloaded it and it's all working fine. THANK YOU SO MUCH!! YOU ARE A LIFE SAVER!!
The only thing I can suggest is making sure you installed the last version of Nitro 10- you can find a download link here: http://kb.gonitro.com/knowledgebase#/search/installer/000001632
Otherwise, you've covered all the bases- the PDF printer is in the plugins utility.