Yiimailer Update To Phpmailer 5.2.8

PHPMailer 5.2.8 improved its SMTP-capabilities. I tried just do copy it into the extensions/YiiMailer-Folder … with no luck:

When trying to send a letter, I get:

"include(SMTP): failed to open stream: No such file or directory"

It must have something to do with the autoloader.

Was someone able to update YiiMailer to work with PHPMailer 5.2.8?