I’m posting this in case any of my readers are experiencing similar problems. The text in both the Passage Guide and Bible Study Windows was only shown for maybe about 5% of the window.
After doing lots of searching on the logos.com site, I found that there are incompatibilities between Logos and Internet Explorer 7, which I just installed a day ago. There is a large download available to correct this problem (logos 3.0b). After downloading this update, I’m happy to say that everything is working great again.
I hope this post helps someone else that might be going through the same problem.

Thanks! I googled this problem and your entry came up. I’m goign to install the patch now.