I accidentally set my virtual machine - Windows 7 - RAM to 4 MB and now I can't load and shutdown it!

I accidentally set my virtual machine - Windows 7 - RAM to 4 MB and now I can't load and shutdown it!
My virtual Windows 7 is stuck in Windows boot mode, but neither I can boot it, nor I can shut down it to change the RAM back to normal. Help! What can I do now?

I'm using Macbook Air if that helps and WM ware Fusion 6.0.3