Hi Fury x721,
I've had a look in my Required folder and there is a font file called AMUI3 which is the file your missing. Its only 17kb big but i am pretty sure you will have to reinstall Atfer Effects to put the file in. If you want to try to cut and paste i`ll gladly send you the file if you let me know your e-mail address, it is only a font file after all its just some programs like to have files installed properly. I`m not too sure about After Effects.
All I want to do with the rest of my life is Edit.