Session Target live Word Count stopped working

The live word count in my Session Target window suddenly stopped working today. It worked fine since I upgraded to 3.0.1 on January 4. Any suggestions?

Have you perhaps been recently working in a section of the binder that is not monitored by this tool? You can check the scope settings by clicking on the Options button and then viewing the “Session Target” tab. The Count text written anywhere in the project setting is off by default, and means that all content outside of the draft area will be ignored, as well as any content inside the draft that has its Include in Compile checkbox disabled.