| Date | Changes |
|---|
| 04Nov17 | App: refreshed all questions and gave the Free questions their own unit. Refreshed all web pages, including making sure that each topic prints on a single page, and that the pages reconfigure for mobile use. |
| 13Nov17 | App: some minor updates before release |
| 18Dec17 | App: new version released. Free questions moved to new unit to keep them together. Many minor changes to text, improved graphics and corrections. |
| 25Jul20 | Web: refreshed all the pages. Corrected a number of minor errors; changed page layouts |
