If you have @Xon's Conversation Essentials installed and the option Prevent conversation hard-delete checked, this update will display a reminder/warning that the option must be un-checked before conversations can be deleted or pruned.
Note, if you have Prevent conversation hard-delete option checked, you can still view pruning conversations counts. You just can not prune conversations until you physically un-check that option. This is by design to respect that setting as you have set it for a valid reaso