To completely uninstall dslrBooth for Mac, follow these steps:
Find all versions of dslrBooth that you have and delete them then empty your Trash.
Finder, Menu, Go, Go to folder:
Delete all files here.
Go to Pictures/dslrBooth/ and rename the Templates folder to OldTemplates.
Then go to Spotlight, search for: Terminal and open it.
defaults delete com.dslrbooth.dslrbooth
Then download and install the latest version from http://dslrbooth.com/download