If you have version 1.0, you can copy the registered version over the evaluation version's files, most of which have the same names to make this work. However, to aid version identification, Version 1.1 onwards are distributed with the name WStarxx, where xx equals the version.

You have several choices. You can delete the evaluation version, dissable it from the Utilities, Templates and Add-Ins... (Tools, Templates and Add-Ins... if the WordStar Command Emulator isn't running), or, you can rename the later version to WordStar.dot.

More detailed installation instructions for available for Word 97, 2000, 2003, XP, and for Word 2007 and later.