I have ECU flash working on windows 10 without an issue. Often times, if windows does not recognize a program as being one of its trusted ones, you have to run as an admin and force it to install. The option is there and its not always obvious. I had the same hiccup when I transfered everything to a new computer.
COBB did. 2006-2010 Impreza 2.5i and 08-09 legacy 2.5i models. I remember.COBB at one time, was programming NA - naturally aspirated ECM... don't remember what years, but not many sales, so that was dropped.