:lol: You took me for someone else. I know what hidden files are and how to set Double Commander to show them. Anyway, thank you for helping healthy laughter!
But seriously, this might be a new Double commander beta bug. If so, It is strange that the bug proved itself with that "enigmatic" folder, as if on cue.
P.S. Most likely, it's because of the fact that .gvfs is not a common folder, but represents a virtual filesystem. Now I can't remember the reason why I had installed it, maybe to handle with a cloud storage or something. Hmm, I need to deal with this...