The last NTFLINT production release is file ntflint.zip.  It contains all
files necessary to reinstall and run the old-generation GUI Flint for
Windows.  ntflint436 is the version immediately prior to ntflint.zip.

The prior production release for Flint/Windows 5.0 is file flintwin.exe. 
It is a self-extracting archive for the entire 5.0x package.

The following files are past versions of just the Flint executable (.EXE)
file.  To use them,
a) rename your existing flint.exe file to flint.old
b) copy the desired past version into the same directory as flint.exe.
c) NOTE: You must of course match the major version (4->4 or 5->5)!

flint436.exe
flint437.exe
flint500.exe
flint503.exe