rehex: download ældre versioner

This release fixes the x86 Windows build so that it works on pre-Nehalem/Bulldozer (circa 2008) CPUs.
For x64 Windows and any other operating systems, 0.62.0 is still the latest release.

This release includes changes and new features to assist editing of sub-byte-width values and non-byte-aligned values in files:
- Add bit array data type (#167).
- Allow selecting and setting comments/highlights/types on bit-sized/aligned quantities, not just byte-aligned (#155).
- Allow defining arbitrary integer types, up to 64 bits wide (#215).
- Allow navigating hex data by nibbles rather than bytes (#58).
There are also improvements to the highlighting feature, and general usability improvements:
- Allow colouring data by byte value (#223).
- Allow changing/defining custom highlight colours and assigning labels to them (#227).
- Use dimmer highlight colours for dark colour schemes (#227).
- Save highlight colours/labels per-file (#60).
- Allow changing keyboard shortcuts (#226).
- Add Shift+Enter shortcut for "OK" in the comment dialog (#226).
- Display offset in both decimal and hexadecimal in status bar (#228).
- Fix handling of relative paths specified on the command line when opening in an existing instance (#237).
On the build/pipeline side, I've switched the toolchain used for the 32-bit Windows version (rehex-0.62.0-win-x86.zip) to one that can run on earlier versions of Windows (XP and above).