While searching for classic software modifications is a common hobby, downloading executable files from random corners of the web carries massive risks.
Many complex mIRC scripts (mSL) were perfected on this specific version.
mIRC was never strictly "freeware." It was distributed as shareware with a 30-day evaluation period. How mIRC Handled Evaluation
mIRC is not abandonware. The software is actively maintained to this day in its 7.x branch.
Other programmers would reverse-engineer the mathematical algorithm used by Khaled Mardam-Bey to generate keys. They would then write a small program to generate functional registration codes based on any username. ⚠️ The Risks of Downloading "Patched" Legacy Software