To install, copy the enclosed executable file ($(basename $EXE)) and dictionary file ($(basename $DICT)) into the same directory on your device using File Explorer, then double-click on the executable to launch it.
For a users manual, dictionaries in other languages, upgrades, information on reporting bugs, etc., point your browser at http://xwords.sf.net. See the "Smartphone" menu there for navigation tips.
Crosswords is free/open source software. Share it with your friends. If you develop software yourself, check out the code (at the above URL.)