The Dingux version seems to work just fine. I couldn't test if it works to edit a text file because if I want to load a text file it won't let me browse to the memory or mmc on my Dingoo A-380.
I've got no idea if this is also an issue on a Dingoo A320 with Dingux.
Is it possible to change the directory so it doesn't start from the root if I wan't to browse to a text file?
Edit: Everything is marked as a file. If I want to open /mnt it just opens a new text file but not the directory so it isn't possible to browse to the directory you want to go to edit the file that you want to edit.