It seems that some applications with application command-line perimeters are not longer launching properly. For example I have DOOM set to launch via DOSbox.exe with the line "J:\GOG Games\DOOM\DOSBOX\DOSBox.exe" as application path. I load the DOSbox config via the command-line perimeters "-conf "..\dosbox_doom.conf" -conf "..\dosbox_doom_single.conf" -noconsole -c "exit"" and it simply brings up DOSbox.exe when launched and then closes it without loading the game. Some games work and others don't now. Duke Nukem 2, which I have set up in the game with, with identical code save for the name "duke2" in place of "doom" works, but DOOM doesn't. Also, the .ink shortcuts included with GOG, which I copy and paste to make my Launchbox shortcuts are working, but it doesn't work when launched through Launchbox. All of these apps were working on the last version (10.15) of Launchbox as well.
EDIT:
I just restored version 10.15 and those applications are working, so something is up with the new build and application command lines.