Upgrade 4 is different from the version contained on the CD.
Download APBA Baseball Version 5.75 Installation & Upgrade Guide Version 1.4
The main changes from the original Guide are on pages 4, 11, and 14-21.
- The System Requirements are now more detailed.
- The Upgrade process is now described.
- The Migration section has been revised to reflect the changes that have been made to the Migration Tool.
- The LPFET section now describes obtaining the LPFET.zip file from apbagames.com and installing it.
The other pages are pretty much the same.