Hi, I had the same problem. Simply open Regedit and under HKEY_LOCAL_MACHINE>SOFTWARE>MC4D delete all values. It worked for me and everybody, will work with you too.
Cinema 4D Studio Bundle v9.012 Multilanguage
http://download.vanix.net/Maxon_Maxon_Cinema_4D_Studio_Bundle_v9.012_Multilanguage_incl_KeyGen-PARADOX/
Российский IP
BodyPaint 3D R2 v9.012 Multilanguage
http://download.vanix.net/BodyPaint 3D R2 v9.012 Multilanguage/pdxbodyp.zip
Ссылки взяты с http://www.vanix.net/