Avira makes many warnings about possible threats and make many false alarms, the program i posted its made by me using autohotkey who its a trusty program an my computer is clean, and you shall trust the fluffy lion
But sometimes the internet and the adds are tricky and makes you to download the wrong file (by intercepting the true download with fake download buttons).
So be sure the program you are trying to run is called
FHkeyfixPT.exe and has the FeralHeart logo or weights 822784 bytes (803KB), and then add the program to the trusty programs on your antivirus.
Tell me about any other question you may have.