If you need new TT-UT1 measurements, get the ASCII file from
http://maia.usno.navy.mil/ser7/deltat.data
and replace the existing deltat.data file.

The leap seconds are located at http://maia.usno.navy.mil/ser7/tai-utc.dat .
New leap seconds should be added to the tai-utc.dat file (simpler format than
the on-line file).

