What version are you using?
Was using 0.98. Got the update/expiry notice today (though the message indicates November 1, so the notice text is wrong as well), updated to 0.99 and rebooted. Got the notice again.
1) Notification appears to be two months too early.
2) Notification indicates updating will resolve the issue. After updating, and rebooting, the notification continues to appear.
3) Unlike OldMsgt's post indicates, my notification path indicates http://labs.stardock.com/Fences has the latest version.
4) Impulse client has link for Fences "History", which normally contains patch notes. The information there is out-dated. This also makes it difficult to confirm whether or not I did actually get a full and proper installation of 0.99.