Hi,
At least it is consistent on all cameras 
The URL´s are there and of cause it should work …By reboot you mean EXIT NCS and then start again? EXIT with the red X. Go to Task Manager and see if there are any NCS processes running. If there are kill them. Start NCS again. Also the official release is now version 1.5.6 Netcam Studio 1.5.6
-Henrik