Firewall causes windows to freeze

When using the configuration window while network is used, it can happen that the whole system freezes. Last time it occured, I clicked on Firewall->Advanced->Network Security Policy and the system froze.
I had the problem twice today.

My system:
Win7 x64
Firewall 4.0.141842.828

By the way: It would be helpful if we could copy the version string from the About dialog.