I would not recomment transplanting them right now, they are already stressed from the nutrient burn, and they are fragile little babies right now, transplanting them would probably send them into shock badly and they might not make it.... if anything I would just recommend flushing your pot of miracle grow (how big is your pot? 1 gallon? bigger? smaller?) and by flushing I mean run distilled water with the right PH through the soil until you see it running out of the bottom for at least 10 seconds... But see if you already have your seedlings in like a pot bigger than 1 gallon you are going to soak the soil too much and your seedlings will get too wet for too long, which will hurt them too, so I just hope you have them in small containers so that way if you drench your soil it will dry out still within a few days, and after the soil is relatively dry after flushing it, you should THEN try transplanting into a better medium, but make sure to be gentle when transplanting or you will damage the root system of the plant. I know this all sounds tricky but its not that bad, you just need to remember next time to start off with the right soil because seedlings and clones are the most vulnerable and sensitive to their environment.
