If you'd like to switch to another subscription plan, do the following:
1. Go to the Subscription page of your online Setapp account and click "Change plan."
2. Choose an appropriate subscription option and click "Change plan."
A payment for a new subscription plan will be charged at the beginning of the next billing period. If you choose an annual subscription, the entire amount of money will be charged ($107.88 + VAT).
Please note that you don't get another free trial if you change your subscription plan.