Sorry for the noob question, but I've taken a loan of alUSD and I want to convert it to a stablecoin that I can use. I can't find instructions to do this anywhere. The Transmuter says "Convert your synthetic tokens to their counterpart at a a 1:1 ratio." I've deposited my alUSD into the Transmuter but that doesn't appear to do anything other than allow me to withdraw my alUSD back out. I'm stuck. Please help!