Sorry, I don't know about PC, but on Mac ...
In Users/<your user name>/Library Preferences/ there is a folder called "Adobe Photoshop CC Settings". In this folder is a file called, "Crop Presets.psp".
You could try copying this file and replacing the same file on your home machine. I haven't done this so back up first! :+)
And if you are on PC, you might try a search for "Adobe Photoshop CC Settings" and go from there.
Ah sorry, yes, should have mentioned I am on a PC.
On a pc it would be in this type of directory, but with whatever version of PS you're using.
C:\Users\username\AppData\Roaming\Adobe\Adobe Photoshop CS6\Adobe Photoshop CS6 Settings
AH, I came so close. I had checked in \appdata\local\...
Thanks for the help!!