The program has problems with the initial unpacking. The solution is simple: download an older version of the translator (3.xx.xx) unpack the game with it, then start a new project with the new version of the program on the already unpacked game.
Currently, there is only one 100% working way to translate games to Unity. This is the utility
You must be registered to see the links
(it has several variants, about three) It allows you to translate games WITHIN THE GAME. It translates and saves the text into a special file.
Translator++ is just an add-on for this utility, it helps you to edit obtained data.
That is - the only way to fully translate the game on Unity is to pass it completely. Selecting EVERY answer in the game, so that the utility saw it and remembered. After that, when you play the second time, when setting up the utility, it will give the remembered and translated text.
This is difficult to explain.
Variants with disassembly of the game into components, I do not consider, this requires a high-paying pipe of trained people.