Did you ever get an answer to this question? I am having the same issues. I have an 8.8 megabyte file which is a DSD256 music performance with no breaks and it will not load into Audirvana.
I’m having the same issue, and others have reported it: my files that are larger than about 2 Gigs do not show up in my library. I would like to request a solution to this problem, please.