When we can expect update?

you can fix this by altering

assets/css/admin.css lines 3-10 to

#cpsh {
width: 200%;
height: calc(100% – 30px);
position: absolute;
top: 30px;
left: 0;
box-sizing: border-box;
}

a hack I know, but given this plugin is no longer being maintained, unlikely to get overwritten.

if you want to do it properly then enqueue an admin style in your functions file and call an admin style sheet eg

//add changes to column plugin css
add_action( 'admin_enqueue_scripts', 'ms_admin' );

function ms_admin () {
wp_enqueue_style( 'ms_admin',
        get_stylesheet_directory_uri() . '/ms_admin.css'
           );
}

and then create a stylesheet in your child theme called ms_admin.css with this in then contents

/*change column shortcode styling to work*/
#cpsh {
	width: 200% !important;
	
}

I also added this to ms_admin.css to take out the ‘are you happy’ stuff

#feedback-choice, .cs-acsidebox__wrapper {
	display : none ;
}

#cpsh-generator-header {
	width: 100% !important;
}