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!
This new version also coincides with the release of the HexEdit sourcecode under MIT licence. Visit the sourcecode repository on github for more information:
Any bug reports and feature requests can be submitted to the github site, where active development is taking place now.