It crashed after last update 2 days ago. I was just going to give it 5 stars. Why not left it as it was. All the downloads before this update are totally unreadable. It took quite an effort to organize them  it is a pity. I tried to reload it but it still reads an error with some texts  it used to be perfect but the last update has degraded it considerably. I am going to look for a better reader.
December 23 2015