My free 30 day expires. I would like de resuscribe for 11 € per month like advertised

You have to pay the regular rate on your trial account to continue your work. If you click the Buy button to get the discounted rate, it will open a new blank QBO account.

https://quickbooks.grsm.io/EU

You may utilize the trial version of a migration tool if required as long as your trial account is not yet expired.

https://transactionpro.grsm.io/qbo