So, I just downloaded Doomsday 2.1 to my rather new Windows 10 x64 installation; started it up, and presto, it finds my all my GOG Doom games without any problem or need to manually select the directories. Off I go configuring add-on packages, decided to rename the files to something easier to recognize; so I quit and restarted Doomsday a few times. So I finally got it the way it's supposed to, and I figure, time to play a round of Doom.
Startup Doomsday; POOF! Games gone, it says it can't find any game iwads; you can manually configure the folders. So I manually configure the folders; still can't find the iwads. Which is doubly odd, as Doomsday also found the master levels and other stuff that comes with the GOG versions of Doom, Doom 2, and Final Doom in those iwads and recognizes them as addon packs; and those addon packs it still sees, so it must also see the wad files.
Tried reinstalling Doomsday, tried starting as administrator, tried restarting the pc, didn't help, figure maybe it's that instability, tried 2.01, no change. Doosday just refuses to see the games.
I noticed 2.01 already had the folders manually installed, so I'm guessing it needs the same central configuration files (have no idea where they are stored) could it have set something wrongly in those files that produces a conflict!?