I first made my grids with the free version. Then I updated to the Premium version. Now I am no longer able to do a query post via post taxonomies and terms. When I click on "Categorie" - no categories are shown for me to choose from. In all of my old grids - I can also no longer change the category. Plus on one of my old grids - it is now showing posts from all categories instead of just the one category of "Guest photographers". https://impressions.bicyclingaroundtheworld.nl/bicycle-touring-guest-photographers/
Welcome to our forum.
You should see a data update notice at top on dashboard, you should run this by click on update link, please see the screenshot, after running it will display categories from old version.
https://imgur.com/LuinQLy
After completing the update, you will able to see categories under each taxonomy by expanding,
https://imgur.com/Z7VZ16p
this is the most advanced taxonomy query we updated in recent version.
Regards