Could not edit in Photoshop.

Hi,
Could someone please assist?
I am using Encore DVD 2.0 and Photoshop CS2 which I have been using for the last
18 motnhs or so. Never had any problems but now when I try to edit the menu in
Photoshop from Adobe Encore DVD (Edit Menu > Edit Menu in Photoshop)I get the
following message:
"Could not edit in Photoshop. Photoshop does not appear to be
installed"
I have reinstalled Encore DVD with the hope that it might pick up its connection
with Photoshop but it did not work. The only thing I have changed was to take my
Matrox RTX10 card out of its PCI slot to try it out in another pc, but have
since put it back. I am reluctant to reinstall Photoshop at this stage as it
would mean I would have to take all the plug-ins and reinstall Envore once more,
as there is a sequence on how to install the Adbove programmes when using with
the Matrox RTX card.
My question is does anyone know if there is a folder in the Encore DVD programme
where I can point the programme to Photoshop? or some other way.
Would appreciate help from someone who might have had the same experience.

Hi Ruud,