Version 1.5 of 529andYou makes it possible to import the file created with the new 23andMe aggregated matching segments file.
It is strongly recommended that you backup your 529andYou database before trying the import options.
The matching segments will be rounded as they still are in Family Inheritance: Advanced. Why 23andMe is still rounding the start and end points of segments is beyond me! This is quite inconvenient as the aggregated file is not rounded. This means you won't need to hit Turbo Compare a bunch of times to get all the matching segments on a kit.
You can also import a previously downloaded 529andYou database. This is still not the recommended way to backup your 529andYou data.