Bob, David, thanks for the comments.
I went ahead and installed 4.0, and ran the scan. It picked up 6 tracking cookies the others had not, so that's cool.
However, since installation, my computer has slowed to a crawl. Though I have a very fast internet connection, it could be my old box - 1.4 GHz Celeron with 384 MB of Ram, or it could be because I left TeaTimer activated, and the Ewido Resident Shield is turned on by default.
Unless there would be compelling advice otherwise, my long-term plan would be to keep TeaTimer activated, and go with the free version of Ewido as an on demand scanner when the trail period expires. Short term, should I turn off the Ewido Resident Shield, or TeaTimer?
Thoughts?