Switching to Loudness Tab causes program freeze

Whenever I switch to the loudness tab on either the top or main views, the program freezes for approximately 4 minutes. I hardly ever use the loudness tab, but every now and again, I hit it by mistake. When this happens, I can’t cancel the action. I have to wait 4 minutes for the program to respond again. The files I’m editing are typically between 2 and 4.5 hours in length.

Wavelab 8.0.1
Windows 7
Intel i5

Unfortunatly, the audio analysis, in this context, can’t be stopped. I guess you are editing big files?