Ok, here’s a solution (hack) to limit the images max size that uses the WordPress Media ‘Large’ size. (Note: You have to make sure that you go go Settings -> Media and set a width and a height on the large field. I use 750×500 and it works great!)
In /model.php insert this code in line 687 (before “Update Link in Content):
//Replace the Image URL with the 'large' sized one
$image_src = $attr['href'];
$wpdb->query( $wpdb->prepare(" SELECT ID FROM {$wpdb->posts} WHERE guid = %s ", $image_src ) );
$att_id = $wpdb->get_var($query);
if ($att_id)
{
$image_large_attr = wp_get_attachment_image_src($att_id, 'large');
$attr['href'] = $image_large_attr[0];
}
In line 1092 of /model.php add the text “large” inside the empty apostrophes:
$d = wp_get_attachment_image_src($att->ID, 'large');
I’m not a coder and this code is probably not the best but it works!