Hi Daniel,
I don't see any way to change this so I'll have to ping DEV and ask them. In the mean time try this sample that goes through the controls and see if you can find the Viewer Tab.
Unzip the attached and then rename it from *.txt to *.zip and unzip again.
I'll have a look also and see if I can find it.
Don
PS: added the wrong sample, this one is the one you want to test with