Help! how can i put this into words? i need to explain it to my best friends parents.?

ok so a few years back me, my best friend, her another friend had a big altercation. so her parents have i guess "labeled" us to be this and that based on what they heard 4 years ago. so regardless of what happened then, we're all totally different people now you know? so we're all 17 now, the other girl moved 4 years ago and is coming back. but from what i see she hasn't changed a bit. she hasn't grown up like we have. so if something comes up her parents will automatically resort back to well we know her to be a liar, untrustworthy, bad etc (whatever they came up with at the time) and i hate being held.. idk how to say it. i want to tell them to not hold that stuff against me, or im not the same person none of us are, like how do i put this into words? you understand what im trying to say? lol. and a lot of what they've labeled me in their heads was a lie anyway. so what do i do? how do i express this to them? i can't find the words.