The ability to view different versions of the bible is not available
I was disappointed when I looked for the NLT version of the bible but it wasn't there so I had to use the default version.
The Church does not own the copyright to other versions of the Bible and, in English, continues to use the King James version with the notes and study aids it has developed. The alternative versions of the Bible are not available at LDS.org either, likely for the same reason.
Additionally, what content is available in the Gospel Library applications is not controlled by the developers. We develop Gospel Library for Windows and its features, but the Church provides the content made available to the Gospel Library apps and LDS.org.