First, you should install Java SDK for your platform (required to run Eclipse) and install Eclipse.
The easiest way to install pgCodeKeeper is Eclipse Marketplace: launch Eclipse, version 4.6 or higher, with the installed Eclipse Marketplace, and select Help > Eclipse Markeplace….
Enter “pgCodeKeeper” into the search box.
Select the pgCodeKeeper package, review the Terms of service, and click Finish for the installation of the latest pgCodeKeeper version to begin.
After the installation is finished, restart Eclipse to apply the changes.
Launch Eclipse and select: Window > Perspective > Open Perspective > Other > pgCodeKeeper.
Another way to install pgCodeKeeper is the update website: launch Eclipse, version 4.6 or higher, select Help > Install New Software… Plug-in installation (with the help of the update web-site) wizard will appear on the screen.