Can't change Virtual Memory Settings using Fusion 5 on MacBook Air

I'm using VMWare Fusion 5.0.3 and I'm trying to start an image.  The image complains that I need to reduce the virtual memory settings.  I go to Settings:Processors & Memory and reduce from 4GB to 2.5GB on the image. There is no Save button, so I click the red X.  I've tried this several times using multiple ways to access the settings and can't save them using any combination.  I started a "working" VMWare image that only has 2GB configured and was unable to change those settings as well.  My MacBook Air has 4GB of physical RAM.