Version highlights:
– Improvements to Template Editor and PDF printouts (multi-viewport templates)
– HOPAGetView4Object using SF and SV
– Presentations improvements – custom summary and general changes and fixes
– Integration with 3D viewer
– Bimeye plugin
And many more..

Full release notes are on our wiki:
https://wiki.tessel.pl/display/HHM/Release+notes+for+version+2.6.0