deauthorize the other computer

Hi Corona Support.

I have a problem, Corona Simulator still show this message after login
"
You are already using this software on another computer.
Please deauthorize the other computer before logging in on this computer.
Or click Purchase to work on multiple computers.
"

But I’m very sure I have never login on another computer.
And I need to use Corona SDK now. Please help me. [import]uid: 69551 topic_id: 12940 reply_id: 312940[/import]