If you updated using the built-in updater, there's a subfolder called "update" in your Dexpot installation folder with a backup of the previous version of the pager plugin.
Thanks, works now. It had another bug in new version, too. I have a Rule, that moves Winamp window to Desktop 3 automatically. When I launched Winamp on other Desktop, it spammed Desktop 3 with a whole bunch of Winamp windows (plugins, configuration etc.). In older version it's OK.