I’m not sure which of the TMPGenc programs you are talking about foghat. They had a free mpg encoder called TMPGenc, a paid mpeg2 encoder called TMPGenc Plus, TMPGenc Author, TMPGenc Express, etc.
TMPGenc Author had several variants with numbers similar to what you posted, but I don’t remember a 1.4 version. There were 1.5, 1.6, 2.0, 3.0 and now TMPGenc Authoring Works 4.
Perhaps you can register your number with them here: https://secure.pegasys-inc.com/regist/index.php?lang=en
Then gain access to their discontinued products downloads.