cubase 8.5 problem

have just bought and uploaded cubase 8.5 and its not functioning at all.
all of the vst instruments i had loaded into version 8 pro does not exist all of a sudden.
i dont understand ,i mean it looks great but its just like ive bought a picture of the main sequencer page.
i payed 36 pounds to have this upgrade and i am not amused …nothing works at all, so i am going back to the previous version. and will not be upgrading again.

many thanks

Cubase 8.5 working great here.

Have you checked your plugin path settings and have you rescanned your plugins in Plugin Manager?