Software editing

I bought 1 TTS software called VoicePeak, but it can only import 1 txt file at a time, I have 20k txt files to process, Can anyone edit it so it can output multiple files for a while
P/S: No source
this link voice peak : https://drive.google.com/file/d/1Ax5KevCltLDl5pHb9VFz7skqDZaXcfI8/view?usp=sharing