Typically, upgrading Jet Essentials and the Jet Service Tier simply involves running the installation program for the latest release. That installation program is then able to uninstall any out-of-date components and replace them with new versions.
Occasionally, however, new features in an installation program require that older versions of certain components be uninstalled before running the new installer. When this is the case, a special notice is added to the release notes for the latest release (listed in the online Knowledgebase at kb.jetreports.com).
From the Windows start menu, search for and start the Control Panel desktop app
You next step depends on which Control Panel view you are using:
If using the Category view, select Uninstall a program If using one of the Icon views, select Programs and Features
From the Programs and Features window, select Jet Reports and then click Change near the top of the window.
On the Jet Setup window, select the Remove option and then click the Next button.
On the next screen, click the Remove button and all installed components will be removed.
Once complete, you can proceed with installing the latest version of the Jet Service Tier.