Sometimes it\'s useful to rebuild an entire site and force bower to reinstall new versions of all the packages in bower.json.
However, there doesn\'t seem to be any way
This is what ended up working for me via Windows cmd prompt:
forfiles /p .\bower_components /c "cmd /c cd .. && bower uninstall @fname"
I've been using nombom to do this (as a bonus, it also re-installs your npm packages from scratch):
nombom
https://www.npmjs.com/package/nombom