Thank you all for your helpful responses. I remember now that when I installed AC 10, I selected "Pro version in demo mode" instead of student version because I do not have a "serial number." I can't remember how or when I got AC 9, but only recently did I decide to spend the time to learn the program. I have almost completed the ArciCAD Training Guide by Thomas Simmons. My hope is to be able to get work as an architectural drafter. I need to find work I can do at home due to disability. I only started using AC 10 in the interest of having the most updated version that would run on my machine. As soon as I am convinced that I can generate some income, I will purchase the key for AC 10. To that end, I am currently taking an unofficial drafting course online.
I am not asking for sympathy - but if any of you can throw some work my way - or even help me by giving me a realistic drafting exercise to do - I would much appreciate your further support.
Thank you...