This post isn't my usual blogging fare but I am fascinated with online super-niche questions and then getting some feedback in Google Analytics.
The short answer is yes it does freeze but the thawing process separates any oils or liquids and so the taramasalata or roe pate as our U.S. friends call it requires mixing up again or even better re-blending, if one were to have a dinner party for example.
I probably wouldn't try to freeze taramasalata again and recommend buying it fresh and eating as soon as possible.