WordPress 2.8 Upgrade using a plug-in?

Hello everyone!

Sorry if I’ve posted it in the wrong section but here’s my question. I found a plug-in called WordPress Automatic Upgrade. I want to know if I want to upgrade to 2.8 (current version is 2.7.1), can this plug-in be used? It says that it’s compatible upto 2.7.1, does that mean that it will let me upgrade to 2.8? Any help would be appreciated.

Thanks in advance!