Installed on one PC, Windows 10
This was a smooth and easy download for me. After installation I opened a blank document so that I could see the necessary menu to click thru FILE -> ABOUT -> ACTIVATE WITH LICENSE KEY. I’d already copied the key to clipboard from the online Shareware checkout page and so I just pasted it into the box and clicked activate. I immediately got a notification from MyDraw that the licence had changed and for the changes to take place the program needed to be restarted. So I did that.
No problems.