maybe you should try an update to the latest firmware 4.0.373. I don't know if an update restore those settings.
If you look at /system/config-directory of your PB622:
- Is there a file "device.cfg"?
- If you search in "global.cfg", is there a line "settings.theme=..."?
And please remember: Don't use the themes made for firmware 3.2.xxx on your device with firmware 4.0.xxx!