When I first start X1, the file list won't include any of the Dropbox files. But, with no intervention on my part, it starts to index them and, once it is completed, they're available in all subsequent searches.
Interestingly, after occurring for several days in a row, today X1 opened with the file list intact.
Interestingly, after occurring for several days in a row, today X1 opened with the file list intact.