I just purchased Lightroom Version 5.2 and cannot import the *.NEF files. Very frustrated. Can anyone help?
You need to update to the latest LR 5.x version. The D610 is supported since 5.3:https://helpx.adobe.com/creative-suite/kb/camera-raw-plug-supported-cameras.html
Download here: Windows, Mac
You should be able to download the latest version of L5.x from
Adobe - Lightroom : For Macintosh
Adobe - Lightroom : For Windows
Retrieving data ...