How do I switch back to Tab for a Cause from Tab for Cats?

To switch from Tab for Cats back to Tab for a Cause, navigate to your account settings (gear icon in the top right) and click "advanced options" under account information and click the "switch to classic" button. 

To switch to Tab for Cats from Tab for a Cause, click the heart icon in the top right and then "donate hearts" then at the end of the charity options click the "try Tab for Cats" button.