Simply uninstall Altiverb 7 via the add/remove software Control Panel.
Mac OS X
To uninstall Altiverb 7 on Mac OS X please delete the Altiverb 7 plug-ins from here:
Audio Unit: /Library/Audio/Plug-Ins/Components/
AAX: /Library/Application Support/Avid/Audio/Plug-Ins/
RTAS: /Library/Application Support/Digidesign/Plug-Ins/
Then remove the following folder:
/Applications/Audio Ease/Altiverb 7
And the Altiverb 7 preferences file:
* Please note Mac OS X hides the Library folder in your user folder (since 10.7). You can go there by hitting the GO menu item in the menu bar when you have a finder window open. Then hold down the option (alt) key and a link to the User Library will appear.