NU version 14.5.0.120 crash when analyzing the registry in defrag

Twice I have used NU to defragment my registry, but very soon after entering the defrag analysis, Vista operating system (64bit Ultimate) returns a message saying the program closed abnormally, but the program continues running as if stuck in a loop.  This forces a hard reboot.  Any solutions?

 

My system includes a dual monitor setup with DisplayFusion Pro version 3.3.0 running.