Photo Paint is not opening when trying to EDIT BITMAP within Corel 13

I downloaded Corel 15 trial verson but decided not to purchase.  After trial I uninstalled the trial.  Now when I use my pre-installed Corel 13 when I try to edit bitmap within Corel draw it open Windows 7 paint instead of Corel 13 Photo Paint.  I tried doing a re-install REPAIR but I am having same issue.  Any help would be much appreciated.