Feb 15, 2017

v6.5, 2017 February 14th:
Fix crash when saving operator stack (persistence)

v6.4, 2017 February 4th:
Fix issue with Fix/Eng interaction

v6.3, 2017 January 17th:
Fix bug in built-in programs selection.

v6.2, 2017 January 14th:
Fix possible infinite recursion in sqrt.
Add support for built-in programs.
Full implementation of the EE library.

v6.1, 2017 January 7th:
Fix P->R routine in some cases.