Major 1. Open file COI.aln
2. Press "build tree" button on main toolbar
3. In build tree dialog set path like this: some_existing_folder/some_not_existing_folder/COI.nwk
4. Press build.
Expected state: new folder created, COI.nwk writter there
Actual state: error messagebox appeares: "you don't have permission to write to this folder"
