To open Twistory, double-click on one of the Twistory document icons. There is a full database called "Complete," and three sub-sets: "Ancient" (history before about A.D. 500); "Nations" (political and national history after about A.D. 500); and "Arts & Sci" (technical and cultural developments).
If you open the Twistory application icon instead, you will see an "Open" dialog box in which you must select a file. Open one of the Twistory document files.
(The history database is actually a collection of text resources found in the "ttt" folder. The Twistory documents you see are index files which merely point into that folder using relative pathnames. Hence the "ttt" folder must stay where it is, with the same name.)
Instructions
To control the time, use the cursor keys. You can also drag the time-line view. To move the map, drag the view or use the scroll bars. To go from map to time line, or vice-versa, double-click on a person or event icon. To get more information on an item, hold the command key while you click on it.
If you have any other questions, please consult the instructions. They are in HTML format, so a web browser is needed. In them is information on how to report bugs, find an updated version, or buy Twistory, should you decide you like it.