I have a desktop with XnViewMP Version 0.86 64bits (Apr 25 2017) as per 'About' box and a laptop, also with XnviewMP and its 'About' dialog says it is Version 0.87 64bits (Sep 7 2017).
Both tell me that I have the latest release when I check for updates from the 'Help' menu
Both PCs are running Win 10 64-bit