i have beem a member sence 2015 , but i was using autocad 2002 and started using desihn spark a mounth ago begening in november , i wanter to start puting on of my designs on dream spark and it says i need a product key . what dose this mean if i had design spark ever sence 2015 , but started useing it in November of 2018 ? and have to have a product key ?