If you need to upgrade or downgrade your paid PPCnerd Plan, you can do so anytime through the link below and your plan will be changed immediately. Please note that if you are upgrading from an Individual plan to a Manager/Enterprise plan, or downgrading from a Manager plan to an Individual plan, you will need to download and install your PPCnerd Scripts again as Google Ads Individual scripts need to be installed/deployed at the individual account level - and Manager/Enterprise scripts need to be installed/deployed at the manager (MCC) level.
https://www.ppcnerd.com/pages/ppcnerd-plan-change
You can also upgrade or downgrade your paid PPCnerd Plan through the PPCnerd Smart Menu add-on within your control center sheet.