I had this exact same question a few months ago. After some digging, I was able to find an ADF.
It's very much a 1.3 era product. It ran on my 3.1 system, but with significant GUI errors - lot of pre-font sensitivity custom buttons and window gadgets. I think it was one of Blue Ribbon's fist products and you can see some of the design concepts that evolved in their later programs. An interesting museum piece, but unless you're running a 1.3 productivity system I don't think there's much use for it.
The version I found was not the latest. There were no major updates as far as I can tell, but Blue Ribbon's newsletters (DLH has them) do mention smaller updates (and, eventually, its discontinuation). Unclear if they were mere bugfix releases or if there are any obvious UI changes. If the GUI issues on newer OS versions got fixed there could be a reason to keep it running if you have a particular interest.
