NOTE: WinGX and Ortep for Windows NO LONGER need you to set any environment variables. Just install over your previous installation and after running the programs for the first time you can remove the WINGXDIR & ORTEPDIR environment variables from your list.
WinGX version 2020.2 (released 5th November 2020)
Ortep version 2020.1 (released 12th February 2020
PLATON & PLATON for Windows Toolbar (PWT)
Archive of the GX FORTRAN source code