Thanks for the heads up on the missing documentation. I've just added the following section to readme.md:
## Updating Jobe
If you wish to update an existing version of Jobe to a new one, simply `cd`
into the Jobe directory, do a `git pull` to update the code, then rerun the
installer as before, i.e.
sudo ./install
Richard
Edit 12/1/2019: I recently further updated the Jobe install instructions to the following:
If you wish to update an existing version of Jobe to a new one, first put the the client Moodle server into maintenance mode. Reboot the Jobe server. Then cd into the Jobe directory, do a git pull to update the code, then run the installer with the --purge option, i.e.
sudo ./install --purge
Check that all is well by testing as in the section "Testing the install" above. Lastly take the Moodle server out of maintenance mode again.