Make a full backup to an external disk before performing any update!

Quit Computer Admin Pro if it is running.

Locate your Computer Admin Pro files and rename the file CAData.ca4 to CADataOld.ca4
Move the file ComputerAdmin.ca4 to the trash or rename it to ComputerAdminOld.ca4

Download the updater file here.

Unzip the downloaded file and move the new file to your Computer Admin Pro folder.

Run Computer Admin Pro.

From the Computer Menu choose CA Preferences.

Click the button labeled "Import records from Computer Admin Pro 4.x"

Verify that your records imported properly. Once you verify your data you can throw away the files that were renamed with "Old".