Function Addition

• Added an option to the eyedropper tool to also eyedropper while dragging.

• Added mouse wheel smoothing option to Preferences.

• Added mouse wheel sensitivity setting option to Preferences.

• Added an option in Preferences to automatically save a PNG thumbnail when saving an MDP file.

Function Improvement

•  The preferences dialog has been made tabbed for improved usability.

Failure Correction 

• Fixed a bug in thumbnail display of layer properties.