Another solution that worked in my case.
Go to: Windows - Preferences - General - Secure Storage.- Password [tab] - [Click button] Recover Password ... - [Answer the security questions].
A new master password is created. [Confirm]
Now click the Unlock button and you should be able to see your systems.
Please note, if you don't remember the answers to password recovery, you may have to delete the secure storage settings (from the contents tab), restart Eclipse and when it prompts for security questions, perform the Password Recovery setup seriously! This is as good as creating a new password which you want to use to recover as mentioned above.