I updated to the latest tides file. The tide displays seem to have large errors. I was looking at the Potomac River today. The tidal graph looked OK, but the text display next to it shows the time of high tide with a height of 0.5feet and the time of low tide with height of 1.6 feet -- implying that low tide is higher than high tide. The text does not follow the graph display.
The currents don't seem any better with the newer tides file.