Changes since the WiFi Ducky predecessor include:
Flash the ESP8266 again, but make sure that you select
Erase Flash: Sketch + WiFi Settings
under Tools in the Arduino IDE.
Because of the limited resources, DIGISPARK or other ATTINY85 based development boards are NOT supported!
If you have a question, you can check out the issue section.
Use the search function to look up similar questions, be sure to check both open and closed issues!