Hexedit is very simple application for distro-update, so obviously hexedit has no current maintainer. Serious coding is not possible without hexeditor, so it that have to be in TC developer toolbox. Of cource one can load tarball and go, but then you need no distro and no TC.
There was big theoretical TC discussion for SCM -style self-consistent packages vs. "normal" library -based distribution. I noticed that SCM:s are disappeared, and obviously replaced with debian package combatibility dCore.
If hexedit maintainer is missing, I can try to update it to 5.x but I'm very overloaded, I'm not familiar with TC-packaging and I'm very slow coder, so it will take LOT of time.
Anyway, that effort is useless without TC library documentation, where I can find it?.