Hi
Not sure this "old" version is always available for download...
Are you sure you really need TPXO 6.2?
The version 7.2 is more recent and probably more accurate but the values will not change drastically...
On internet we could find this comment
TPXO.5 through TPXO.7.1 have been computed using inverse theory using tide gauge and TOPEX/Poseidon data.
It finds the optimum balance between observations and hydrodynamics.
TPXO.5 is given on a 0.5 by 0.5 degree grid while TPXO.6.2 and successors are given on a 0.25 by 0.25 degree grid.
TPXO.7.0 and TPXO.7.1 differ only in the constituents P1 and S2.
The latest version TPXO.7.2 also includes GRACE data.
The TPXO_Atlas version is a combination of the global solution TPXO.7.2, patched with local tide models.
Regards
Regards