I am working on the Salesforce Connect trailhead module, specifically Integrate External Data.  When I create external objects they are not showing up in the Object Manager section in setup. How do I get them to show up in the Object Manager?

I'm using MS Windows 8.1 with Google Chrome Version 35.0.1916.114 m
I have a free Salesforce trial version

From the "My Name" menu I chose "Developer Console".
I get a new window Force.com Developer Console with the "Loading workspace ..." progress bar.
The progress bar gets hung at about 50%.

Any advice?

Oded