Resetting the workspace didn't do anything so I replace the preferences and that restored the missing section.
The weird thing was though that after doing that I couldn't see any hyperlinks from my existing project. I created a new page and a new field and added a hyperlink but still nothing showed up only http:// in the URL window. It wasn't until I actually clicked on the up/down arrows at the end of the URL field that anything showed up, no matter how many hyperlinks I'd created.
Thanks for your help, restored window shown below...