My wife did her own design work, but she did not want to use any CAD software, claiming it was much faster to do it by hand, besides, by the time she learned the software, she could finish doing everything she wanted. Her only concession to mechanization was the purchase of a specialized pair of sizzors that made allowances fot the came. At the time I had a current version of Autocad LT. There weren't any specific programs for glass work then.
Have you given the Glass Eye the 30 day try?