Upon loading my characters, after confirming that I want to load my addons anyway, I get the following (familiar) warning:
The game may not work correctly unless you have updated all your modifications. Are you sure you want to try to load them?
Changes can be made by using the “Addons” button in the lower left.
However, the lower left no longer has an Addons button, as those are accessible through Menu (top center of the Warband screen) > Addons.