I created and named a new desktop. I gave this new desktop the name VEX and that name did appeared in the Desktop window list, after I saved it. But that title has somehow gone missing.
Now I'm stuck with this VEX desktop which appears to have replaced the original Build desktop.
The VEX desktop, has no parameter pane, I replaced it with another Network pane. I did this because I was following a tutorial which had the same desktop layout.