No. Updates to latest software and firmware versions of Tango are available regardless of subscription status. Newly added functions won't require additional payment, only check if subscription is active or expired. Subscription activation can be purchased from ecutool.com or any of Distributors. You will receive archived *.lic file, which upon loading in Tango will activate the subscription. To Load the file start Tango.exe and select Help->Updates->Activate License->Open the *.lic file. Start Tango.exe and select Help->Updates->View License. The first row shows a counter with subscription time remaining. Currently Subscription is available for 1 year periods only The activation file (*.lic) is valid for 7 days after generation. After that period it expires and Tango will no longer accept it as valid when loaded. In this regard once received the subscription has to be promptly activated, so it is pointless to purchase more than one subscription activation with intention to hold onto it and load at a later date. Tango returns to the state that was before the Subscription purchase. All previously actived keymakers will continue to work (Can be viewed in software Help-> Updates-> View Licenses). Device will be able to update itself. Tango without keymakers and Subscription is able to update itself and has access to all functions marked in the features list on this page as "Base Software". To unlock payable functions, marked as "Subscription" you need to purchase install an annual Subscription license. Tango without keymakers and Subscription is able to update itself and has access to all functions marked in the features list on this page as "Base Software"