IMPORTANT: before you install, you MUST manually remove the old 
ShuttlePRO.kext file from the Extensions folder as follows:

1. Launch the Terminal

2. Type:

    sudo mv /System/Library/Extensions/ShuttlePRO.kext /oldshut

3. When requested to do so, type in your admin password (you may need to 
use the root password, I'm not sure about this)

4. Type:

    sudo chown -R <yourusername> /oldshut/

(where <yourusername> is the short name used for your user account)

5. Now you'll see a folder at the root level of your Mac OS X disk named 
"oldshut". Drag it to the trash to get rid of it.

6. You'll need to quit the ShuttlePROEngine application (daemon) using the 
Process Viewer utility if you want to empty the trash before rebooting. 
All you need to do is launch Process Viewer (it's in the Utilities folder 
located inside the Applications folder), find ShuttlePROEngine in the list 
(type "shuttle" to find it quickly) and double-click it.

7. Now you can install the new version by double clicking the ShuttlePRO icon.