The Doxillion executable is usually located as "C:\Program Files\NCH Software\Doxillion\Doxillion.exe"
Usage: Doxillion.exe [options] [files to add]
"Options" is where you can issue a series of commands to Doxillion. The options are:
-convert - convert all files loaded into Doxillion.
-addfolder [FOLDER_NAME] - add a folder of files into Doxillion.
-format [FORMAT_NAME] - specify the output file format to convert the loaded files to. The format names are the file extensions for each format (e.g. .doc, .rtf).
-outfolder [FOLDER_NAME] - specify the output folder to store the converted files. Do NOT end the folder path with a backslash '\' character.
-overwrite [OVERWRITE_FLAG] - specifies what to do when the converted file already exists. The flags are "PROMPT" (Prompt for What to Do), "ALWAYS" (Overwrite the File), "NEVER" (Don't Convert the Original File), "CANCEL" (Abort All Conversions).
-clear - clear the Doxillion file list window.
-hide - hide the Doxillion window.
-show - show the Doxillion window.
-exit - exit Doxillion.
"Files to add" is where you type in the files you want to load into Doxillion. All typed filenames must use the full filepath of the name, and be circumfixed with quotation marks.
Doxillion.exe -format RTF
Doxillion.exe -outfolder "C:\My Documents";
Doxillion.exe "C:\My Documents\Essay.RTF"
Doxillion.exe -convert "C:\My Documents\Essay.RTF" -format .docx -overwrite ALWAYS
Unless you are in the Doxillion folder you will need to replace "Doxillion.exe" from above with the full path "C:\Program Files\NCH Software\Doxillion\Doxillion.exe" like this:
"C:\Program Files\NCH Software\Doxillion\Doxillion.exe" -convert "C:\My Documents\Essay.RTF" -format PDF