The easiest way to play those files is to transfer them on your PC. Connect a cable to the phone and enable USB/MTP Connectivity. You will find the phone mapped in the Computer. Double click it, choose Internal or External storage and look for the Automatic Call Recorder's folders. Based on my knowledge, you will find the recordings in the Recordings folder.
Transfer the files to PC and then use any audio or video player to play them. The files must be in a compatible format, meaning that you should have already set up to record to WAV or MP3 from withing the program's settings.