Bug fix release 30.5-Jul-2018

[jsachs]

I have posted a new release (30.5-Jul-2018) in full installer and executable-only versions. Minor changes to help file.

The changes (taken from the update log) are:

Posterize: added probe – clicking on the input image now appends a color from the input image to the palette.

Mask: Fixed problem with Load Settings causing a crash in some cases.