I was wrong on the name it's called A9cad
Here is a video of it, for those used to the older Autocad look how close the look of it is
a9cad - Search Videos
www.bing.com
Edit: I have just downloaded it, many adverts before downloading & prompts to download many others but downloaded, checked for viruses ok, & it is pretty fast, this version is an upgrade from one I tried many years ago so impressed, however, as I have ACLT I will stick with that for the time being.
Actually, I do loose sleep sometimes thinking about things, not in this case though, many a time in the past before I retired, if I was on a project & there was something I was struggling with I would try to solve it while in bed, on a few occasions I would get up & solve it ready for visit to site the next morning, usually meant using up the complementary coffee in the hotel room with a visit to the night porter for a few more.