fastest way is to check the file size of the phps. if the crc or file size is different.
if it’s different, then check whats different.
I have some of my own modifications in the zbench in some of the phps.
so i go to those, and copy and paste into the new one. and test if it works.
basically go to
\wp-content\themes\zbench
i check functions.php
i copy the code from the old zbench file, and put into the new one.
<?php
// --------------------------------------------------------------------------
// Start Add NextPage Button
// --------------------------------------------------------------------------
add_filter('mce_buttons','wysiwyg_editor');
function wysiwyg_editor($mce_buttons) {
$pos = array_search('wp_more',$mce_buttons,true);
if ($pos !== false) {
$tmp_buttons = array_slice($mce_buttons, 0, $pos+1);
$tmp_buttons[] = 'wp_page';
$mce_buttons = array_merge($tmp_buttons, array_slice($mce_buttons, $pos+1));
}
return $mce_buttons;
}
// --------------------------------------------------------------------------
// End Add NextPage Button
// --------------------------------------------------------------------------
save then check it works.
So best if you write down what custom changes you did, that you may need to re-add whenever you update.