Hello Ivair

Thank you for your purchase.

Please note that as a custom solution, this doesn't fall into included support for the plugin. The needed CSS code is simple, though, so please just use this:

.row.wdt-edit-dialog-fields-block {
display: block !important;
column-count: 3 !important;
}

This works on the Aqua skin:

But it should work on others as well.

Hi again Ivair

Please provide me a temporary WP-admin login for your site where this happens, so we could log in and take a look ‘from the inside’ as that’s the most efficient way to see and resolve the issue. We do not interfere with any data or anything else except for the plugin (in case that’s a production version of the site), and of course we do not provide login data to third party. 

You can write credentials here just check Private Reply so nobody can see them except us.