Upgrading to the newest version

[Scooter]

I am running the version 8 and it runs beautifully......................I saw the new version just released so I wanted to download............I did and opened it up but was unable to replace version 8 with version 9...........the Plan g I open is still version 8
Waht did I do wrong????

[tim arnot]

Delete the old version first, then unzip the new one.