I have 1.4 version, and I tried both to create a new directory, as well as most importantly, to choose a bibliography file as well as a CSL for the file. Both creating a directory or choosing a file for the bibliopht does not work. I tried to change for the bibliography getting into the config file and typing on it, the directory of the bibliography, but it did not work. It might be that some part of the UI are not working, and it might be my computer settings.
I deleted the Zettler folder from my Application data, in order to reset to the original state. It did not work out. I ask Hendrik and all the community, what would be the next step to look for.
I am an Egyptologist/Heritage specialist, so I am able to follow and understand instructions, but I do not have any specific knowledge where I should.