I've already fully paid for a one-year subscription, which
is still active. However, I have a series of sessions I need to host, and the number of seats exceeds the limit of my plan. It looks like there's an option of changing my plan, which would make sense if I had a monthly subscription, but I'm not sure if this is an option for those of us on an annual plan. The extra seats are only needed for a three-week period, then the capacity of my current plan should suffice.