In this new release:
1) New dockable and floatable toolbars;
2) Improved text quality for LCD screens;
3) Better support for JBIG2 images with Huffman encoding;
4) Better support for symbolic fonts (Symbol and Zapf Dingbats);
5) Fixed a number of minor bugs.
Widely used as an Adobe alternative; no install; just unpack to your choice of location; a good reader!