After logging into your dashboard, you'll click on your avatar at the top right corner. In the dropdown, choose "Company Settings."
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On the company settings page, you'll see a column dedicated to managing your subscription. Here you can click the "Subscription" button to select a different subscription tier. Below that, you also have the option to cancel your subscription or update your payment information under billing.
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If you choose to cancel your subscription, you'll lose access to features within the Margo platform, but you won't lose your projects or company architecture.