New User trying to learn Affinity after decades of Freehand. I built an Affinity doc using tutorial support, very happy with it, then hit a wrong key and lost all my hard work. Tried "control z" tried "delete" tried to get back to the file I was working on. I think the error was hitting "new artboard" ... I could not escape nor return to my file, which was lost to the ages. Speaking of ages, I am 77, have been a Freehand lover since early '80s, have MX on my old computer. Newer computer Mogave 10.14.6 accepted Affinity and works fine. Except of course of the difficulty I just outlined.