I do not know if you have also got the script .rpy files along with the images after running the batch file that
c.mork attached to his post. These .rpy files contain all the dialogues present in the game. Look if you have these files somewhere inside of the 'game' subfolder in your game directory.
(For seasons 1 and 2)
update8.rpy
update7.rpy
update6.rpy
etc.
(For season 3)
update9.rpy
ep9_freeroam_ph1_events.rpy
ep9_freeroam_ph2_events.rpy
etc.
If you have them, then you are good to go. The contents of these .rpy can be seen (and edited) with the text editor of your choice (Windows' integrated notepad will do, for instance).
Anyway, it is good practice to either make a backup of your game directory before using unren or make a copy of your game directory and then use unren only with this copy of your game directory you just made. This way, you can always roll back in the case something goes wrong.
Finally, if you cannot find those .rpy files, then you'll have to run the batch file again. This time choose first option #1 and then the #2.