There hasn't been a new release of BEMCheckBox and it appears that no new release is forth coming. There are a couple fixes that have been committed to since the official BEMCheckBox 1.4.1 release. It would be nice to incorporate those changes.

Edit (Aug 8, 23): The BEMCheckBox has been forked and a new a v2.0.0 release created. Try to use this release.