Hi @andypp,
Currently we don’t have any kind of feature like that to disable editing published post as post authors should be able to update posts all time.
But for your specific case I can provide a workaround.
On this file : /wp-content/plugins/wp-user-frontend/class/frontend-form-post.php
On line 220 add this code :
if ( $curpost->post_status == 'publish') {
return '<div class="wpuf-info">' . __( 'You can\'t edit a post while published.', 'wpuf' );
}
This should do the trick for you. Let me know how this goes.
** And please save a copy of this file as this will be replaced while you update the plugin. But to get rid of this hassle we will add a filter hook on next release.
Thanks