A new version of HexEdit has been released - version 2.0.4. This version addressed a lot of the bugs and issues that were present in the earlier beta versions. HexEdit should be fairly stable and usable now!
www.catch22.net/software/hexedit
This new version also coincides with the release of the HexEdit sourcecode under MIT licence. Visit the sourcecode repository on github for more information:
https://github.com/strobejb/HexEdit