Hi,
This is definitely going in the wrong direction. First, can you please install the latest official version 1.5.6 from here Netcam Studio 1.5.6 so we are on the same version. NCS have been developed rather rapidly lately ;).
I actually discovered that my PTZ buttons are gone also just now. First make sure that the PTZ is enabled in the template. Second, go to Settings - Client Settings and enable Show PTZ in multi view. Now the buttons should be back. If not save the template again. The PTZ function is modified so for the buttons press and hold down and release when in position.
Do these steps and see if we are lucky.
-Henrik