The reason Techs on the phone ask you to do stuff is that they have no idea how smart you are when you call.
They have to treat each person as if they've never operated a computer before... because half of them haven't.
As for the export.. it contains actually quite a lot of information. Export has been part of Decal for at least a year now, possibly two (as I was the one who added them).
The reason for the export is to take a look at what plugins you have, what video card you have, what drivers you have, and what Decal specific information can be used to diagnose certain issues. It's mainly useful for Plugin support, but it is very beneficial to overal Decal support as well.
As for your problem, maybe you should update your graphics card and see if the updated drivers have any affect on it. I can't see anything right off that looks odd, but there is always something. We know Decal works as there are quite a lot of users who are using it flawlessly... but it's the people who aren't that we have to pay attention to and figure out the common thread in them.
Sometimes that takes time.


