Updating Pyfa is easy if you used the git clone command. Each time the source code is updated, you should only need to update the directory. Navigate to the Pyfa directory in a terminal and execute the following command. This will update the directory with the updated files. This should work 99.9% of the time but you should note that if the developers add a new package, or update methods that are no longer compatible with the environment, you will have to debug the issue to make it work; see debug tips.