Kindly do not post any materials on hacking/cracking in whatever form. We do not accept such activities. Kindly treat this as your first warning. Also read the Forum Rules.
It is not TDL, but a TCP.... which is a compiled file. Compiled TCP cannot be read or deciphered by anyone, including Tally Solutions.
Only in certain cases can it be hacked/cracked or deciphered.... so overall attempting to do that is not acceptable on this forum.