Regardless of where you obtain it, a "Full" functional copy of Mango Autoclicker should offer these core capabilities:
Once you have the clean executable, follow this setup guide for optimal performance. mango autoclicker full
To avoid crashing an application or getting banned, the full version includes a "Stop after X clicks" feature. You can set it to click exactly 500 times and then shut off. Regardless of where you obtain it, a "Full"
Given the nature of your query, here's a general report on autoclickers and a specific note on "Mango Autoclicker" as I understand it: Regardless of where you obtain it