we have found a critical bug which – in some cases – prevents nomacs from starting correctly. If you experience this issue, we would recommend to update nomacs to version 1.6.3. The issue applies only to the Windows versions. Users of other OS can safely enjoy version 1.6.2. Sorry for any inconveniences caused.
For the Matlab users who do not enjoy the default image display behavior of Matlab: this script allows you to directly display images in nomacs.
— the nomacs team