This article will show you how to install the Keywin 5 client and/or the synch engine. The synch engine is the function that sends info from the Keywin 5 client to the SQL database and the Keybox, if it has been deleted or never installed in the first place you might need to re-install.
In the film you can see that I chose "complete" installation, and the installation program can tell I already have an SQL database installed, and only installs Keywin 5 and the database manager configures the synch engine.
If I already had a Keywin 5 client, only the synch engine had been installed, and if I had no SQL Database that would have been installed automatically as well.