Hey George,
It’s my pleasure to help!
If I were you, I’d capture a complete backup, database and site files, and follow the User Guide to update to ExpressionEngine 2.5.2
What is very likely to happen is a series of errors until you can get through the updater. Essentially, we need to set /system/expressionengine/config/config.php
$config['app_version'] = '231';
*but* if some of the database changes have already been made, the updater will complain. Then you’ll be chasing down lines of code in the ud_xxx.php files.
It’s not going to be easy, but best is often *not* easy.
When all is said and done, you will have your client up on EE 2.5.2 and we’ll know where we are going forward.
I’ll subscribe to this thread to be sure I get notified. If you get into a spot where you need advice, let me know and I’ll get you through this.
Cheers,