On NppPluginList (32 bits), HexEdit remain the older version 0.9.5 on SourceForge, whereas HexEdit 0.9.6 is available for both 32/64. I have fixed recently a crash bug for Notepad++ v7.9 (https://github.com/chcg/NPP_HexEdit/pull/37). So it'll be good to point it on newest version.
On NppPluginList (32 bits), HexEdit remain the older version 0.9.5 on SourceForge, whereas HexEdit 0.9.6 is available for both 32/64. I have fixed recently a crash bug for Notepad++ v7.9 (https://github.com/chcg/NPP_HexEdit/pull/37). So it'll be good to point it on newest version.