Hi fmelin,
Thank you for your purchase.

You can hide columns using this code that I wrote for you.
In ../wp-content/themes/twentysixteen/functions.php add this code

function test_func($jsDef, $columnHeader) {
    if ($jsDef->origHeader =="OrignalColumnName") {
        $jsDef->bVisible = false;
    }
    return $jsDef;
}
add_filter('wpdatatables_filter_column_js_definition','test_func',10,2);

Where "Original ColumnName" is the name of your column that you want to hide.

Hi fmelin,

You just open the file /wp-content/themes/twentysixteen/functions.php 
(in this example twentysixteen is the name of the theme, maybe you are using some other so go to that theme you are using) and add the code below. 

Also you can hide some columns using CSS.
If you don't know how 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.

And point me exactly which column you want to hide.

Hi fmelin,

Can you please point me to the table ID and to the columns that you want to be hidden.

Also i noticed that you are using 1.6.2 version of our plugin.
The 1.7 version is out .
You can either update plugin manually by following this guide or you can auto update.
For auto update to work you need to enter purchase code on Settings page of our plugin.
Also I suggest you after you update it do the deactivate/activate of the plugin.

Hi fmelin,

Can you please now take a look at your table and see if columns 4 and 5 are hidden. 

You can hide some columns when you uncheck the Visible button for that column in Optional column settings.
Please take a look at attachment.