If you use VPN’s, then you must click at the top-right of KDSPY to log out—after every session.
Because, once you log in again—on another random IP address (VPN)—the system sees two “active” logins. Do that over 3+ times, and your account will be temporarily locked out, preventing your password from working.
Just ensure that you log out of KDSPY after every session and you will not run into any issues with your login details.
That said, you will be able to get back in immediately if you remove and reinstall KDSPY.
That will reset the cookie and allow you back in.