Good day, sirs. 1str of all, Maxthon plugin at addons site a bit outdated. Addons site has only 3.2.17 version, but I'm using 3.2.41 version. Support team of LastPass is blaming on slow process of submiting extensions to Maxthon. I will post a link to fresh version if it will be allowed here. 2nd, mark4051, your problem related to your password. I faced exactly the same problem after I changed my LastPass's master password. After about 1.5 months of investigation I changed my master password again (with a tip from support team). And it began and is still working.