4) Retain feature I hate, there is no visual indicator that program is opening, this leads to customers trying to double click multiple times
I agree it is annoying to have to wait the 6-8 seconds each time we try to open a file when FM16 is not already open. Since there are no indicators that anything is happening, it does seem as though the program is non-responsive or perhaps we didn't actually double-click the file or app icon.
5) when program is open asking for signin there is no icon on windows screen showing FM is open. If you leave screen, no easy way to return
You can use the Windows shortcut ALT-TAB to find that login window again. But if you don't remember that it is there waiting for you somewhere and you instead try opening the file again, nothing will happen (because it is already waiting for you on the login dialog...somewhere in a black hole) and it is ultra confusing. The app should bring up that dialog when you've double-clicked the app icon again.