I saw that there was a patch to unlock everything.

Can someone link me to it?

You should find something here :
http://www.soccergaming.com/forums/showpost.php?p=2459259&postcount=2

As I didn' test it, you should also use the tool "search forum" :

http://www.soccergaming.com/forums/search.php

You would find the threads regarding this patch and the opinion of the users

Welcome to U
(One more advice, find and use the Backup and recovery tool before changing something in your game)

Thanks