When you upgrade a Teamup calendar from free to a paid subscription, you keep the same calendar. Existing events, sub-calendars, settings, and configuration stay the same. Upgrading simply unlocks the new plan’s features on top of what you’ve already built, so you can keep working in the same calendar.
Here's how to upgrade to a paid subscription:
Open the Teamup calendar in a browser.
Click the blue menu (top right).
Select Settings.
Go to the Subscription tab.
In the Billing section, click the blue Billing details button and enter your payment information, then Save.
Click the Monthly or Yearly tab to select your billing cycle.
Click the green Select button for the plan you want.