Usage: decoder.exe <filename> or <directory file_extension-to-process>
For all files use *

Examples of usage:
to process one file, use "decoder.exe c:\firestarter.pdf"
to process all jpg files in directory c:\photo and all subdirectories, use "decoder.exe c:\photo jpg"
to process all files on disk C, use "decoder.exe c:\ *"

Decoded files are marked as ~decodedA or ~decodedB.
Probably bad decoded files are marked with extension "err". They can be deleted. Only when some problems occur, they should be checked.
