Well, i having same problem.
I can login in dps.thermaltake.com, but in new 3.0 app its dont work. login, pass, press "login" button....and nothing.
Also i founded that this application trying to "http://push.thermaltake.com/"
and... "Account OR password incorrect"
(also i removed \roaming\Tt folder)
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Hm, I just noted that the indicator of hdd-activity blinks every second (the LED at usb-hdd connected to the PC also blinks).
After application switching off everything returned to normal.
By the way, the version 2.x of this program led to the fact that in 5 minutes all mechanical hdd began to make a sound, on similarity of the mechanical clock (tick-tock, tick-tock). Also - every second.