What's happened? Since today in the morning on all my PC the plugin wasn't in the plugin section. Has it a coded death? It would be terrible if the xap functionality is gone in xlobby. Anybody with the same problem?
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Ahhh found the problem. It was a new xapintranet.ocx (xAP-Application from mi4). After uninstalling the xap-intranet launcher, unregistering the ocx, reinstalling all the xap-xlobby plugins, restoring my xap schemas - all is running again.
I wonder that a problem with a ocx on my server has crashed all configurations on my clients.