Welcome to Maxthon Help, the home of Maxthon questions and answers.
Because Maxthon 3 has dual display engines, at times they will require different Flash plugins. You can get the ones you need at the links below.
Flash plugin for Ultra Mode: Download：http://get.adobe.com/flashplayer/otherversions/
Flash plugin for Retro Mode（The same as IE） Download：http://get.adobe.com/flashplayer/
IMaxthon 3's final version comes with all of the necessary Flash plugins for both Trident and Webkit.
Presently, Maxthon 3 supports most of Windows 7's 'aero' feature and its download progress preview.