After notifying lastpass that there is no way in either the plugin or in maxthon itself to disable the auto update feature I got this reply: "Thank you for your response. We now do not offer reverting to the older version as a workaround to the issue. Apologies for the delayed resolution of the issue. However, our dev team are still looking for a definite fix. You may want to use another browser for now. As always, if you are still having issues,or you have any comments, feedback, or question, by all means, submit a support ticket, and we'll make sure to take care of it for you. Otherwise, feel free to resolve this ticket. All the best! Martha"