Tried to import Aperture library into Lightroom that I just installed (the trial version), and although it does find the Aperture library, the "Import" button is disabled so I can't do the import. Tried several times, but just can't get it to work. Running Mac OSX 10.9.5 with the latest version of Lightroom. Aperture version is 3.5.1.First time I've run Lightroom, so it's a basic install downloaded from CC and is the latest version. Aperture library was just rebuilt, so it should be OK. Almost all files in the Aperture library are referenced, but there are a few managed files. Any ideas on how to proceed?