Why this happened
Some of the CDs you installed were version 3 add-ons. Yes, version 3 add-ons *do* work in Version 4 of PC Study Bible.
All of the PC Study Bible add-ons are smart enough to install their *content*, and not install their *program* update, if you already are running a newer version. So, for example, if you are running version 4.0 (or later) of PC Study Bible, then you install The Amplified Bible with 3.3A Update, The Amplified Bible *will* be installed into your version 4 program, but the 3.3A Update will *not* be installed.
However, there is a nuisance side effect of installing a version 3 add-on onto a version 4 system: you may see a PC Study Bible *3* (three) icon appear on your desktop (and in your Start > Programs menu), in addition to version 4. This does *not* mean that you have installed both version 3 and version 4; these are just extra version 3 shortcuts.
How do I fix it?
Install last one of the following CDs:
--- first choice: any add-on CD which mentions Version 4.2B or later. If you have several of these, choose the CD with the highest version, e.g. 4.2F is better than 4.2B.
--- second choice: Version 4 Upgrade Bonus (BON-50PD-2 or later). Also called Version 4 Bonus.
--- third choice: your Reference Library CD which has the highest version, e.g. 4.1 is better than 4.0.
* * * *
If such a CD has already been installed, re-installing it will *not* create duplicate information; it just cleans up any version 3 icons and (if it is one of the more recent CDs) it consolidates all PC Study Bible entries in Control Panel > Add/Remove Programs into a single line ("PC Study Bible (remove only)").