You can ask him if he can send you the patch files.
If he opens the following : ‘’ c\user\username\games\aoe3DE\usernumber\patchData ‘’
There is a folder located named ''25.2 ‘’
Backup your savegame folder.
Then post the folder he had send you in the exact same path.
Done, you are patched.
** This is not an official work around **
Sorry for the inconveniences.
Greetings, Maxy.