Our Launcher using Flash, so if you using Windows XP or Windows 7 and you normally not doing Windows Update, so make sure you also do your Windows Update from Microsoft which are important for security and Frameworks updates.

Next thing you want to check is, if you can run the game through Max.exe and if it's just the Launcher that doesn't work properly.
If that's the case, then means you got to update your flash through Adobe website :
Direct Download Link https://get.adobe.com/flashplayer/

Then simply do restart(though when installing flash this is not require) just in case, run the Launcher and see if problem is solved.
If still doesn't work, i guess you doing something wrong.

Let us know.

Try to do what Gilad had said