If you MUST know Nancy, I'm not going to spend $50 on software that is going to expire and I can no longer support (for the people who bought the cd). So in order to do that, I would need to pay $300 for the cd, which I'm not ready to spend. $300 is 3 years of the old upgrade, which I didn't have a problem spending. So who knows when I'll decide to upgrade. At this point, David and I do most of our work in v13t, so to not to neglect other users who have not upgrade, for their own reasons. David already drop support on v11 and v12 so we have one version, which works in v13t and v14c.
And, if it works in v13t and v14c, but doesn't in v15, then it's an issue with AM (something has changed).