It was the best like before 2 years
but now if you use it you will get banned for trying 2 times
You will be investigated and may fail the exam, and it will be found that you attempted to cheat.
This happened to me, and they literally told me that I used UndownUnlock.
"The system detected a hacking application called “UndownUnlock”, or a copycat variant of it on your computer device."
Please be careful, this is a serious matter.