So far as some testing goes - all attempts have failed to get them to run from anywhere but steam.
I know it (Steam) can generate a desktop url (web document) to launch it's games and apps.
So, DFX2 launches with the argument inserted in the url but I'm going to have to muck about a bit more to get some conclusive answers as how well it's working - if at all.
steam://rungameid/32610 /d
Back later...
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