Keep in mind that I've found nothing about this so if this is already implented you can go ahead and lock this.
Basically what I'm suggesting is that whenever there is a new client coming out and Windbot hasn't been updated for it yet(even if it takes an hour or twelve hours) our accounts should be frozen so time wouldn't drop from our subscription because we can't really use Windbot with the new Tibia clients when Windbot hasn't updated to it yet.
I'm sure you can figure out some system for it or whatever, extending everybody who has an active subscription as many hours or days as it takes for you to release the new Windbot client.