Okay I'm not as bad as backups as I thought. The folder is dated March 2014, but the files were actually copied on 8/30/2014 (I always just copy the whole folder over when I do backups of the Calibre Preferences). So it was after version 2.0 was released.
However, when I install Calibre portable 2.0 on my other PC, delete the files in the Calibre Settings folder and copy the backup files there, then start Calibre Portable and click Preferences --> Metadata Plugboards, it still shows nothing there.
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