Sorry for the late reply.
Try this way:
1. In Windows Start Menu, "Run", input "Regedit" then click "ENTER".
2. Try to locate "HKEY_LOCAL_MACHINE", click to expand the tree.
3. Try to locate "Software, click to expand the tree.
3. Keep the same step as above, find "CyberLink", "PowerDirector" and "5.0".
4. "New" a registry key by right click the right pane
5. Select "DWORD value"
6. Input "EnableWaveForm"
7. Click "Enter" then you have it.
Launch program again to see if it works.
By the way, I recommend you trying PD6. This new version seems optimized the UI responsiveness.