When updating, did you follow the steps for safe update in the documentation? http://wp-dreams.com/demo/wp-ajax-search-pro3/docs/#important_upgrade_notes
It might help you.
1. All you need to do is select the isotopic layout, and set the search results position to blocking. http://wp-dreams.com/demo/wp-ajax-search-pro3/docs/assets/images/image_6.png
2. There is a submenu called “Priorities”. I think that's what you are looking for. More info in the documentation: http://wp-dreams.com/demo/wp-ajax-search-pro3/docs/#result_priorities
Thanks for noting that issue, will look into that.Best,
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