Well, one solution is to wait a few weeks. I know, it's harsh, but the Architect's Edition release has player import/export, which makes things easy.
But it shouldn't be the operating system that's the problem. Short of poking around on there for you, the only thing I can suggest is deleting the DROD folder on the laptop first, then copying over your desktop folder to fill the void. If that doesn't work, DROD would be reading from a different data file, in which case you have to find it.
Matt
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