The option of celebrating your teammates' work anniversaries is available for paid plans only. So if you're on a free plan (you can see it at the bottom of the BirthdayBot Home tab), you first need to upgrade your subscription to unlock this feature.
Once upgraded, open BirthdayBot on its Home tab and find your team in the Birthday Teams section. Hit the View Details which will take you to the birthday team page and will allow you to edit the team by clicking the relevant button.
The Edit window will pop up and give you a chance to change the team name and related channel. Skip this by clicking the Next button and you'll see the Options pop-up.
Uncheck the Celebrate birthdays option. The pop-up should be looking like this:
And you're done!
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