[Dreading]

I have been downloading and viewing the news on my Sony E-reader for quite some time and the Menu links worked fine. I selected the Sony E-reader as my device when installing Calibre. I have now bought a Kindle Fire as well. When I fetch news and transfer to device (Fire), I am asked if I want to convert. I say yes. It converts and transfers just fine, but the menu links do not work on the Fire.

Do menu links just not work on the Fire? Or, is the problem having something to do with the fact that the news is being downloaded in such a way as that Calibre anticipates that I will be viewing it on a Sony E-reader? I understand the menu links are HTML, so I would think they would work on the Fire? Can I change my primary device in some way to make the Fire the default?