Calm down, ppl are trying to explain to you what happened, not be unkind. When you put info in mIRC options like perform, you expect it to be saved dont you? What happened to you is a good reason why we suggest ppl NOT put passwords there where someone could see them if they get access.
When you open parts of your computer to other ppl, it stands to reason you need to take a close look at exactly what you are making available.