JBS is very simple to setup, either for a first time or updating your systems. On downloading the required files from the Downloads section of this website, it is as simple as running the files and following the wizard.
See the installation instructions here
In any case you encounter an abnormal behavior with JBS, Refreshing the database is normally a fix. JBS currently uses MySQL database, and the 'refresh' operation re-aligns database tables that may be dis-aligned.
To refresh the database, login to JBS as an administrator. Go to Administrator Panel under the Users menu. At bottom-right corner you have a link to refresh the database.
We highly recommend having a power backup device (UPS) on your computer(s), especially the server computer, to avoid effects of power surge on the MySQL server.