Uninstall the existing ZT exec agent service using the script UninstallExecAgentServiceWin64.bat . Run files UninstallZebraTesterServiceWin64.bat and UninstallZebraATSServiceWin64.bat in case you also have the controller and ATS services installed.
Then go to the ZT installation folder and run the Change ZebraTester Installation exe file under the folder _ZebraTester_installation , this will uninstall the existing ZT version.
Restart is not a must after the uninstallation , but if you don't do restart please wait for a couple of seconds so that the uninstallation will clean up all the files , that have been copied as the part of the existing installation. Uninstallation won't delete any files that application created , for example .prxdat files or any config .dat files.
Now please start installing the new 64bit ZT exe or msi package.
After the installation is finished , install the services using the files installExecAgentServiceWin64.bat , InstallZebraTesterServiceWin64.bat and InstallZebraATSServiceWin64.bat ( only need installExecAgentServiceWin64.bat in case of agent server)
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