There's an error when I open brd file : ERROR(SPMHOD-38): Design being opened has passed its lock expiration date;it can no longer be accessed.

Hello,

I'd successfully opened the brd file before, but it shows error now when I open it.

It shows "ERROR(SPMHOD-38): Design being opened has passed its lock expiration date;it can no longer be accessed."

How could I resolve it? 

By the way, it is the locked brd file which need password, I've no idea if it related to the error.

Much appreciated!