Yes but they may already be updated. When LR CC/6 made a new catalog from your original catalog it may have converted all your images from the old process, 2010 or older, to the 2012.
Although going through some of my older images from 2007 I do find some still using the 2003 process and ACR 3.4 profile. But most have been updated to the 2012 process.
You need to go into the Camera Calibration section in the Develop module to check.
Unfortunately all the files that had not been updated in LR4 have not been updated by LR 6 and I cannot find a way to upgrade them under LR6!
Go to the Develop module and expand the Camera Calibration section. In there you will find what you need.
Many thanks! indeed, you are right, the process tool is under "Camera Calibration".
I wouldn't have thought that it belongs to "Camera calibration" but anyway....