Backlight 5 and add-ons

If you are upgrading to Backlight 5, are you required to upgrade all the add-ons as well?

I said this in the newsletter and blog announcement, but I understand it may have gotten lost in the wall of text.

You do NOT need to re-purchase add-ons that you already own. The upgrade to Backlight 5 will get you the latest concurrent builds for your add-ons. No additional cost.