Server name (in Web) and 5.0-alpha4

Hi,
I have two questions:
I have two questions:
- I recently changed the name of my server but the old name still appears on the login page. How do I change it ?
- I wanted to try OMERO5.0-alpha4 and so downloaded the VM, but the OMERO server running on it says it's 4.4.8... Is it ?