Plex for Windows, reverting to older version

Every time I start plex it asks me to update to the newest version, if I accept, then it actually reverts to an older version… So I uninstalled it, manuallaly downloaded Version 1.29.1.1974-a65b3ef3. But same story, on the next restart it asks to update then proceeds to DL an older version Version 1.27.1.1571-2fface66… this will keep happening on each startup, and just keeps going backwards.