Can I "roll back" Dragon?

Hi, my Comodo Dragon just updated to Version 55.0.2883.59. Now I’ve lost all my passwords, bookmarks etc! OMG! can i revert to the previous version?? I’m too old to remember all these passwords to every site! why did it NOT say it was updating and that I would loose all my settings/passes etc??
■■■■ this is totally annoying and will be a source of much concern for me for some time.