Dvdrb pro preview/edit tab not working

[Jon05]

Hi,
I have installed DVDRB PRO v1.28.2.
Operating system is Win 7 32bit.
Everything seems to work very well,
except the PREVIEW/EDIT tab is greyed out.
When I first installed it was working,
then later it greyed out.
I have reinstalled DVDRB, but the problem remains.
Started working yesterday and today it stopped.
Does anyone know why this is?
Thanks.

[jdobbs]

You can only PREVIEW/EDIT after performing a PREPARE. Normally that means you are running in 3 click mode (rather than one click). PREVIEW/EDIT requires the generation of the .D2V and AVS files (done during PREPARE) so it has something to work with.

[Jon05]

Works fine.
So simple, how did I miss that one.
Thank you.