You do not have to uninstall the old version & install the new version.
You have to install/update the new version on your MAIN COMPUTER/SERVERusing the INSTALLER & DATABASE TUNER.
On your client computer/computers you have to install only the INSTALLER and do not install the databae tuner.
I would not go through the hassle of uninstalling and installing when the method mentioned above works just fine without any problems.
Grenville