Hello, if you want to manually remove the plugin data, make sure you first deactivate it. Mostly, post_sorter is writing in post_meta table with key defined in the main file:
define( 'POST_SORTER_META_KEY', 'post_sorter_order' );
So you can remove with phpMyAdmin all meta where key is post_sorter_order.
The plugin writes in options as well, where it stores the desired behavior selected in settings screen.
The keys of the options are:
- post_sorter_custom_type
- post_sorter_enabled
- post_sorter_no_admin_sort
- post_sorter_direction
- post_sorter_enabled_roles
All the options and meta values are with prefix post_sorter_, followed by their ID, so you can search for such options.
However, I would not suggest removing this by hand, since WordPress stores its own plugin data (for active plugins) in own options (WordPress core-specific ones), which may differ in different versions.
You can use Delete/Remove plugin after you deactivate it, this will clean you database.
Regards