You can log into your account to retrieve your licence keys, access your downloads or cancel your subscription any time. Just click the "Account" button up top and go from there.
Any licences you've purchased will be listed in your account. If you made a purchase and it does not show up, please contact support at email@example.com.
When you purchase Gust, you'll receive a licence key. It will be displayed on screen, emailed to you, and you can always access it from your account if you lose it.
Each licence gives you updates to Gust for the duration of the licence. You will always be able to download the most recent valid version for your licence. If your licence expires, you'll be able to download the latest version released prior to your licence expiring.