Upgrading to v6 (Linux)
Thanks for upgrading to v6. The upgrade process won't take more than a minute or two, and then you'll be able to enjoy the new features in the v6 client.
Download the new Graal v6 client from the GraalOnline downloads page (click the "+" button next to Linux) and replace the v5 client with it. Be sure to download the client appropriate for your architecture.
If you are having issues upgrading to v6, you should talk to staff members on a server you play regularly to see if they can help you. If not, posting a thread on the Graal forums is the best way to get help.