version 0.4.1 released as stable

With 0.4.0 in beta for more than a month, it is the time now to release the first stable version of this branch – 0.4.1

As you would guess this version fixes some issues of the beta version. Now 0.4.1 is considered a production release.
The most important fixes are made for the external PNG optimizer implementation, but there are some usability changes, also.

v.0.4.1

• fixed some issues with the external PNG optimizer implementation
  • replace {IMAGE_FILE} parameter is done only once. fixed;
  • a custom PNG is not remembered at program restart. fixed;
  • delete/configure buttons should not be disabled after adding an external optimizer. fixed;
  • modifying an external optimizer name creates orphan records. fixed. added checks for duplicate tool names;
  • scripts as external optimizersnot working out-of-the-box. fixed

• bugfix: “Remove selected” button from batch mode disables when a multiple selection is made with the mouse.The keyboard selection worked. Fixed !
• fixed some issue related to automatic preview mode disabled.
• Preview button now disabled when “Automatic preview” is on
• improved performance of conversion functions from transparent indexed images
• changed shortcuts for “Fit in window” ( now / ) and “Actual size” (now * ). These simpler ones should increase productivity
• changed batch settings by adding an “Apply” button. to be more intuitive
• fixed an unwanted behavior with selecting and option without actualy putting a check next to it, which causes that option to apply.
• modified an error message to specify that both dimensions are required for batch resize