Yes, you can upgrade your license any time you want and to any higher plan.
For example, you are willing to upgrade from a “Personal plan” to a “Professional Plan” and have already used the personal plan for 3 months. Then our system will deduct the subscription fee for 3 months of usage and adjust the remaining balance of your current license to the new plan accordingly.
You can also follow this document.
Still confused! Contact us on messenger or raise a ticket here. We will be happy to assist you.