aneesh , the big take away is our TPS was not redesignated just extended so i don't think if you did not file during the initial registration period you do into qualify.

This extension allows eligible Nepalese nationals (and aliens having no
nationality who last habitually resided in Nepal) to retain TPS through June 24, 2018, so
long as they otherwise continue to meet the eligibility requirements for TPS. The
Secretary has determined that an extension is warranted because conditions in Nepal
supporting its designation for TPS continue to be met.