Hi there! If you're on v1 of Cross Sell (you can check this in the app's Account section) and want to upgrade to take advantage of v3's new features, follow these steps:
-> Email us with the subject line "upgrade" and include the URL of your store in the subject and description of the email.
-> We will go ahead and create a duplicate of your live theme and we will do an upgrade on it.
-> Don't worry! Your data will not be lost, and we will test the update on the duplicate theme then we will request you to review it and if you are okay with it, you can implement it on your live theme ;)