I did mention in an earlier post about the instructions coming from the Australian version and, yes, that version is from Imagination games.
From my own research of articles from the last few years; some, but not all, games previously released by Imagination Games in the U.S. were sold off to a company called Spin Master Games. Last year, Spin Master bought out Cardinal Industries, but still releases games under each company name.
BTW, some of the other titles originally manufactured in the U.S. by Imagination, are now being made by Outset Media, which has just released Jeopardy!