You can edit the following to your functions.php (for example)
<code>
function no_edit_lock($retval, $cur_time, $lock_time, $post_date_gmt){
return false;
}
add_filter( ‘bbp_past_edit_lock’, ‘no_edit_lock’, 1, 4);
</code>
This will overwrite the default edit_lock behavior.