How can I stop the promo box pop up every time I close out of the graphic suite?

This promo box pops up when I close out of the Graphic suite.  It used to be just the nag box but now it bounces over to a sales landing page at Corel.  This is really annoying.  Every single time.  I got the message!  I'm not stupid.  I'm aware there are more recent versions.  It is tantamount to harassment.  Can anyone at all tell me how to stop it please?