Since downloading LR(2015)2.1 version at the end of October (version with new Home Page and Import Page graphics) I have a problem with importing files from desktop. For example, I click on Import > Add Photos >Browse Computer>Desktop> select one file from a folder. Then Import screen fills with all the files from that folder or even some other folder on Desktop. The Import button at upper right says Import 1 file and if I click on that I do get just the one chosen file imported. How do I clean up this situation? Also loading time for LR is very slow: 30 seconds just to get LR Home Page to open, and another 30 seconds for Import page to appear.
To tell you the truth, the idea of using Lightroom to import one specific photo from a folder or from the desktop really feels like it runs against the entire idea of Lightroom. The way I would recommend you use Lightroom is to import all of the photos into Lightroom, organize them, edit them, and as needed distribute them (print, JPG, e-mail, web). It seems to me that you are missing out on some of the major benefits of Lightroom.
If you must import a single photo from a folder, use drag and drop.