Hi Erik,
I set up the preferences all the time fresh, with a new installation. Which I have to do quite often. I’m not aware of a transfer function from an previous release to the current.
Plug Ins are sometimes in need for an update, as well as a new serial number is required from time to time. I wouldn’t just copy and paste those, but perhaps it might work in some cases (there are too many plug ins available to say anything with certainty, not knowing someones specific mix.)
If you create your own presets for the content browser, I would keep them on your disk in a specific folder. This folder can be accessed directly from the Content Browser. You can also copy this folder (Content Browser> Edit> Copy) and then create a new catalog/folder and paste this folder into it. To my knowledge, this will only copy the “path” to the folder. I suggest this, as you keep a folder on you disk that you can copy anywhere if you work for someone else on their equipment. (Copy from r14 to past r15 will not work, so far my tests) There are other options. But I hesitate to repeat the manual here ;o)
All the best
Sassi