Balabolka has been running here since XP, then Win 7, now on Win 10 1909. Did you get it from the
Balabolka site or elsewhere -- I am always wary of 'elsewhere' download sites? I mainly use Balabolka to create MP3's to I play on my pod or phone.
Maybe MS will resurrect the EPUB reader in Edge and fold in the TTS technology you want. The pre-chrome Edge Epub Viewer had TTS, which was quite good. Not sure if it was SAPI or this new stuff… or something else entirely.
BR