Updated to Traktor 2.6.6 - cover art missing

Hey guys,

Apologies if this is a bit of a n00b question, I use Traktor from time to time but I wouldn't say I'd be proficient with the ins and outs of everything.

I updated to 2.6.6 the other evening and had it all updating on the laptop while I was doing a few other things. I wasn't really paying too much attention to it when a dialogue box popped up asking me if I wanted to import my old collection etc, I clicked no (obviously should have clicked yes).

Now I've got my collection back into traktor but there is none of the old cover art with it.....highly annoying! Is there any way to get it all back?

Thanks in advance for any help you guys can give!