I purchased an inexpensive product called Flirc (the rev. 2).
It works perfectly with Logitech Harmony remotes and may be programmed with a keyboard to store key sequences or single keystrokes that may be programmed into the Harmony remote. It seems this is a perfect solution for my desire to use my Logitech remote with Roon. I just started the Flirc programming but so far everything works perfectly.
I can even program the Alt-Tab to switch from Jriver when watching a movie to Roon for music.
I’ll look again -
It was some time back when I looked at it last but not all commands were supported then and Windows wasn’t quite there yet. All that may be in place now so the solution may be for a problem that did not entirely exist. Story of my life.
Well at least I can now swap between running computer programs with my Harmony or most anything else that I may want to use in the Windows shortcut list. It makes swapping between JRiver and Roon easier since I don’t need a keyboard to do so.