The login sign in option is located in the WiseStamp Editor.
Follow those steps:
1. Open The WiseStamp Editor - locate the WiseStamp Icon  in your webmail menu, click the icon and choose 'Edit WiseStamp'.
2. On the upper right side of the WiseStamp window click "Sign in" or the "Facebook login" in order to log in to your account.

Enter your email address and password as requested.