No, the edit-on Pro software comes with a perpetual license. So, the right to use edit-on Pro will never expire. The 1-Year Support & Maintenance Pack is optional and entitles you to receive priority technical support and all maintenance releases or updates or upgrades for the duration of the support period. It is available at the time of purchase of a license or upgrade at the cost of 20% of the software license fee. You can renew the 1-Year Support & Maintenance Pack until the end of the subscription period. The cost of renewing is 20% of the software license fee on the renewal date.