This is a good piece of software, but I'm having a problem using it with a font project I'm working on.
I originally created the glyphs with Gimp and used an online tool to splice the atlas and create the font. It has glyphs for code points beyond the Basic Multilingual Plane: the Shavian block (U+10450..U+1047F), Mathematical Alphanumeric Symbols (U+1D400..U+1D7FF), the Supplementary Private Use Area-A (U+F0000..U+FFFFF), and a few others.
It imports into PixelForge, but when I export it, it no longer has the glyphs beyond U+FFFF.