Hey guys, I got CS6 Master Collection in art school as a part of my tuition payment. They gave me a serial number and everything. I no longer have that serial number. Everything was working fine until a week ago they told me my serial number expired and now I have to join the Adobe Creative Cloud. I already have all the programs. I've been using them for 3yrs. Now they don't work. Any idea of how to access my old serial number?