I shoot pictures with a D70 (canon) and i imported them always with no problems. After a update or installation of a external program the import dialog does not show any pictures anymore. It's a black screen. The files can be read from the filebrowser and are regular cr2 files (raw files). What can I do? There are 149 files on the card and non are shown, see below
further in the forum I found this and it did the job
I would suggest you to reset Lightroom preferences and then check the same.