Thanks for great handy tool.
But there's a problem. Windows 7 x32, KindleUnpack 0.61, 0.62 From GUI shell the tool works perfectly, but when it is started from command line AND filename contains cyrillic symbols, it says that "'utf8' codec can't decode byte 0xcb in position 0: invalid continuation byte". Renamed with latin characters file will be unpacked pretty well, so the problem only with filename handling. Is it possible to do something with it?