Deleting Previous Editions of Premiere Elements

Somewhere on the mac in a Elements folder there is a icon for uninstalling Elements. Use that.

Will this work for you?  The editions are seperate and named with the version.  They are not interconneted.  

• Locate the app in the Finder. Most apps are in your Applications folder, which you can open by clicking Applications in the sidebar of any Finder window. 
• Drag the app to the Trash, or select the app and choose File > Move to Trash.
• If you're asked for a user name and password, enter the name and password of an administrator account on your Mac. This is probably the name and password you use to log in to your Mac.
• To delete the app, choose Finder > Empty Trash.