In this post we will upgrade pfSense 2.0 from RC1 to RC3.
For the purpose go to this page with the news about the RC3 release:
and click on the Upgrades link: http://www.pfsense.org/mirror.php?section=updates
select a mirror and download the image that suits you, in my case it was:
Now go to System > Firmware and click on Enable Firmware uploads.
Click on Choose File button, select the file that we just downloaded, and click on Upgrade Firmware button.
Wait for the firmware upgrade process complete.
That’s it. If you want more graphical representation, I’ve just uploaded a video here with the whole process.