Inside a .doc or .docx file there is a lot of extra coding apart from the plain text words. (Actually, a .docx doesn't even seem to show the ordinary text words inside it!) For example, the name of your printer, the owner of the software, information about styles etc. For accurate results, WordSmith needs to use clean text where these have been removed.
converting your .DOC or .DOCX files
The easiest method, for multiple .doc or .docx files, is to convert using the Text Converter.