Well I haven't tried it from here yet but according to outspark this is what they want us to do so I would recommend anyone having problems if you haven't done it this way then download it from here instead of using the launcher to do it for you:
*Important Notes
There are still a few kinks that need to be worked out when updating your version of Fiesta.
It IS recommended that you install Fiesta using the full install available in our Fiesta Download page found here:
http://fiesta.outspark.com/support/view=download
Patching through the launcher will automatically download and reinstall the full client (happens only once). This is required in order to get everyone on the proper platform. If you receive an error, check to make sure Fiesta exists on your system. By default, it is installed in C:Program FilesOutsparkFiesta
If it is not installed on your system but you have gone through the automatic download process, restart your computer. This should resolve your issue.
If you received a "Launcher Installation error. Object reference not set to an instance of an object", please restart your computer. This should resolve your issue.
Thank you,
- Outspark Staff