I downloaded and installed Twine 2.1.3 for Windows (64bit). No error messages. When I run the exe all I get is a blank window with two menus - Twine and Edit. The first has Show Library and Quit options, the other has the usual cut/copy/paste/undo. Doesn't seem to be anything I can do with it... am I being thick? are there pre-requisites that I don't have? Twine 1.4.2 seems to be working OK.