Help with ripping from a game that has custom files

[Daxar]

Yeah, Stardew Valley is an XNA game. Formats are the same so it just works (also the program is called "XNB Node," so there's that)
As for dlls, you're probably just missing a runtime or some such. I was just posing an alternative to the xnaconvert program you found that I can verify works for extracting these files.