Already logged in

This is weird... I was about to trade with someone in town when my client suddenly stopped responding- I could type text into the chat but it never shows up in chat log. And I was already at a barrel but I couldnt move items to the barrel. I also couldnt move anywhere. It was in a strange state of being frozen.
Then I tried using the Options menu Switch character button but it too did not respond, so I closed the client with the red X in corner.
I tried to reopen the client and log in but it says Already logged in.
I saw no Java.exe processes running, so I decided to restart my computer.
Upon reboot, still same thing - Already logged in.
Using Enders client if that is relevent
Then I tried using the Options menu Switch character button but it too did not respond, so I closed the client with the red X in corner.
I tried to reopen the client and log in but it says Already logged in.
I saw no Java.exe processes running, so I decided to restart my computer.
Upon reboot, still same thing - Already logged in.
Using Enders client if that is relevent