There are two separate solutions. You only need to do Solution 2 if you can't do Solution 1. Both solutions assume that PC Study Bible is closed and that any error messages have been cleared off the screen.
Close PC Study Bible
Click on Start > Programs (or All Programs) > PC Study Bible 4 > Reset to Factory Defaults
Follow any instructions you see on the screen.
When you start PC Study Bible again, the program will act as if you are opening it for the first time. For example, you'll have the opportunity to set your Bible preferences again. You may also see the following message as the program starts. This is normal in this situation.
PC Study Bible did not shut down correctly last time - rebuilding topic database (this may take a few minutes)
This Reset to Factory Defaults is a new option, starting in version 4.2D. Feel free to use it whenever you get an error message from PC Study Bible. It does no harm.
You only need to do Solution 2 if Reset to Factory Defaults is not shown on your Start menu.
In a folder usually called C:\Program Files\Biblesoft\PC Study Bible 4 (or 3)\RefWorks,
find and delete the following files:
category.cfg (if it exists).
Find the file Scu.dat on your system (usually found in C:\Program Files\Biblesoft\PC Study Bible 4 (or 3)) and delete it.
Locate the file reg2scu.exe (usually found in C:\Program Files\Biblesoft\PC Study Bible 4 (or 3)\Program)and double-click it to run the program (nothing will appear except for a brief flash of a dos-prompt screen). Do this twice.
Start up PC Study Bible and see if the problem is gone.