I have Maxon Cinema 4D R8.0001 (Cracked by Paradox).
Now, I install update to version 8.1 and serials number are wrong..!!!!
I found cinema 8.1 serials on this web but these serials doesnt work with cinema 4d 8.1 studio.. only plugins and bodypaint are OK
Please help me.... (my english isnt good!!)