Files have changed locations and name since a recent release. The new release file is in
libs/lz-string.min.js (or in
libs/lz-string.js if you don't care for the minified version)
Sorry about the mess in other repos. This will not happen again.
$ npm install -g lz-string$ lz-string input.js > output.txt
Home page for this program with examples, documentation and a live demo: http://pieroxy.net/blog/pages/lz-string/index.html