actually the best way would be to delete everything and start again, and then use Easy Install to download and install your modules.
To remove everything, you need to trash the Application, and the Accordance folder in the Application Support folder in your user library (press OPTION and select LIBRARY in your GO menu).
Probably best just to drag the folder onto your desktop until you are sure things are working.
also the folder ~/Library/Preferences/Accordance\ Preferences (again, by pressing OPTION and selecting LIBRARY in your GO menu).
Also ~/Documents/Accordance Files onto your desktop.
Then try again and use Easy Install and it should work fine. It could take quite a while though, depending on what you own.