Previously used auto-save backups of Microsoft Word documents (.asd) can be only recovered (back to .doc) using specific older versions of Word (up to version 2007). Other than that, it will be probably impossible to recover the document from .asd by other means. Just a simple rename from asd to doc apparently does not work.
Unfortunately, no 3rd party utiliry to open and access .adf files exits and the only way to achieve asd to doc conversion is to use the recovery function in proper version of Word.Open ASD file Open DOC file
One of the most popular word processor program from Microsoft Office suite
A Mac version of the popular word processing application