I guess I wasn’t clear enough. YES! IF you want to run with categories under the version SLP 4.8 that works best with WP version 4.8 then you need POWER version 4.8. Otherwise you can opt to downgrade your SLP to an old version that worked at the time you made your tagalong purchase whenever that was or just restore from your previous back-up. You have a back up of your site right?
The change over was announced over the past 18 months. No more support, updates, etc of ANY old legacy add-ons. If you do not see them for sale on our site now, that means they were discontinued.
.