Can't find "Apps" tab under OpManager build 12100 (APM Plugin)

Can't find "Apps" tab under OpManager build 12100 (APM Plugin)

Hi,
the title says pretty much it all - under the main interface of OpManager 12100 there's no "App" tab. Given the (obsolete?) instructions found here https://www.manageengine.com/network-monitoring/apm-plugin.html#InstallInstruct it should be present.
The binary is running in the server, the Application Manager page is reachable at http://<opmanager_ip>:9090 but it will only allow a login through OpManager. Under Settings -> Add-On/Products Integration the Application Manager tab is correctly configured.
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