Thanks for the reply, I did export the materials, and import within KeyShot Library. I exported an entire folder, which might be the culprit, that KeyShot simply cannot check the compatability for a quantity of materials like that.
I suspect that it is during the "checking material updates" process, that KeyShot replaces resources and in this step, corrupts or deletes files, so that it is unable to launch again.
I did the export and import within the library, not just a move in the folders on my drive.
I have successfully been able to do a similar operation in the past, but not for so many materials, and that time both instances of KeyShot were KeyShot 6HD.
Regarding IPR, This is just the case. I am trying to transfer the materials TO my employer, as I am keeping(buying) the laptop from the employer.