Hi @nicolaberto,
You should have received an email with your purchase on how to create your account for our store. If you are unable to to find the email then you can create on by going to the below link and clicking Never received your password? if you never finished creating your account.
https://users.freemius.com/store/3577/login
Once logged in you can access all your active subscriptions via the?autorenew?Renewals & Billing?section. Active subscriptions will have a green label on the STATUS column and will start with?AUTO RENEW ON <date>. Simply click the row of the subscription that you’d like to cancel to access the subscription’s advanced panel, and then click the?Cancel Auto-Renew?button.
You’ll be prompted with a confirmation dialog, giving you the option to set up an email reminder instead of canceling right away. If you do proceed with the cancellation you’ll get a short feedback form where you can let us know why you are canceling the subscription. Your feedback is appreciated and will help us improve our offering. That said, the feedback is optional, so whether you provide it or not, hit the?Send & Cancel renewals?button to complete the subscription cancellation.
You will also find this information in the Store FAQs.
Let me know if it helps.