Help, can't connect to a game

I have changed the PC and I can’t reload the game logs (I play by exchanging logs with my opponent, Space Empired 4x module).
I have read that the saved game player match is made using the password inserted in the module. Clearly I did not recall the password, so, from inside the log in the old PC I changed the password to a new one. But now from the same PC I can’t access my old saved logs! What could I do to recover the game thread?
Thank you very much.