I followed all of the directions and it still doesn't work.  My files still close and I have to go in and manually open them every time I start QB.  I know it works on other computers because I don't have this problem with my clients, just my own personal version.   I just bought the new 2020 desktop version and hoped for the best and got the worst.  When I shut down QB reverts back to not saving the desktop.  This should be a simple fix.