To Upgrade your TubeSpanner subscription plan, go to https://app.tubespanner.com/subscription-plans and make a purchase for the plan of your choice.
You will be charged for the upgraded purchase with the remaining balance being adjusted into the first payment. You can check your current plan by logging in to https://app.tubespanner.com and selecting My account from the left-hand menu, then Current Plan.
To Downgrade yourTubeSpanner plan, go to https://app.tubespanner.com/subscription-plans and make a purchase for the downgraded license plan of your choice.
You will retain access to the current tools/features for your original purchase until that plan expires, at which time your plan will renew at the new price with the tool/features updating to coincide with that update.