Reg disappearing of Widget class in QNX 6.3 Photon micro GUI

We have a problem with the Photon microGUI of QNX 6.3
After installation of QNX6.3 , Photon also gets installed automatically.
On opening the Photon application, the widget , resources, callbacks and browse files also appeared. But , after some settings change, the widget class disappeared whereas the resources, callbacks and browse files are present. How do I get back the widget class ? Can anybody help?

Bye
M.Shanthi

hello,
Is it evaluation version or full commercial version?

The QNX 6.3 we use is 30 days Evaluation copy.

Bye
M.Shanthi