Links to Download the different grades: 

Preschool - http://www.knowledgeadventure.com/jumpstartworld/downloads/JSPTransSetup.exe  

Kindergarten - http://www.knowledgeadventure.com/jumpstartworld/downloads/JSKTransSetup.exe 

1^st grade - http://www.knowledgeadventure.com/jumpstartworld/downloads/JS1TransSetup.exe   

2^nd grade - http://www.knowledgeadventure.com/jumpstartworld/downloads/JS2TransSetup.exe

These are the new names of the games so you do not get confused.

They are the same game.

Jumpstart world Preschool = Jumpstart 3D virtual world ages 3-5 My first adventure

JumpStart World Kindergarten= JumpStart 3D Virtual World Ages 4-6, Legend of Grizzly McGuffin

JumpStart World 1^st Grade= JumpStart 3D Virtual World Ages 5-7, Trouble in Town

JumpStart World 2^nd grade= JumpStart 3D Virtual World Ages 6-8, Quest for the Color Meister

The records are kept on the local C drive, so your games will be starting over if you are loading on a new machine. If you have access to the old hard drive, look up the article on moving the games to see how to move the records over.