HELLO THERE. I HAVE TWO LOCKS, IDE 7 AND IDE 8 STEEL. IDE 7 DOES NOT LOCK WITHOUT IDE 8 INSTALLED. AFTER I ATTACHED IDE 8, MY PROJECTS THAT I MODELATED AT IDE 7 OPENS AS IDE 7. BRIEFLY, I CANNOT OPEN THE PROJECTS I MODELATED AT IDE 7 WITHOUT INSTALLED AT IDE 8, IT SAYS "SENTINEL KEY NOT FOUND (H0007)". CAN I KNOW THE REASON FOR THIS?