To allow pop-ups from a specific site:-

The site's URL will be listed in the Ad-watch Event-Log window.

Go to C:\Program Files\Lavasoft\Ad-aware and open that folder.

Find the file called sites.txt and open it.

Search for the URL that was blocked. (Less the http:\\ part)

Remove that entry from the list.

Click File > Save.

Close the file.

Terminate Ad-watch.

Restart Ad-watch and go to the site.

If you follow those directions the site will now load