Decode Shell Extension description
After the application is installed a "Decode" item is added to the Explorer right click context menu when a file is highlighted

Decode Shell Extension supports multiple attachments, multi-part files (already concatenated), Base64(MIME), yEnc, BinHex (Mac format), quoted-printable, plain text, XXENCODED, and User (table) encoded files. Support for yEnc is new to version 4.6.

Usage is via Windows Explorer. After the application is installed a "Decode" item is added to the Explorer right click context menu when a file is highlighted. If that file is the raw text (including the attachment data) of an internet email message, Decode Shell Extension will decode the attachment(s). If the attachment consists of only one file, Decode Shell Extension will pass the decode file to Windows for opening with either the program associated with that file type or Notepad.

For virus safety reasons, Decode Shell Extension will initiate opening/launching of .exe, .com, .bat, & .cmd files. We suggest that you scan all message text files and decoded attachments in advance with your anti-virus checker before loading them.