Complete Edition is Only Playing Colonization

When Civilization IV: Complete Edition first launches, it defaults to Colonization.

Workaround: 

1. Open your start menu
2. Select "Computer"
3. Select "C: Drive"
4. Select "Program Files(x86)" or simply "Program Files" for older operating systems
5. Select "2k Games"
6. Select "Firaxis Games"
7. Select "Civilization IV Complete"

In this folder, you will find all of the executable files for Civilization IV: Complete Edition. Please Find the executable file for the base game and all 3 expansions. Right-click on these files and select "Create Desktop Shortcut". You will now be able to launch each game from a desktop icon!