I have PSE 7. I want to process Nikon D3100 (.nef) raw files, but apparently have no existing ACR plugin. I realize that I would normally need to update to the latest ACR plugin, but am not sure how to begin, since there is no "original" plugin to update. Your advice will be much appreciated.
Support for that camera was added in ACR 6.3, which requires Photoshop Elements 9. Consequently, there isn't a version of ACR that will do what you need. You will either have to upgrade to a newer Photoshop Elements, or else use the latest DNG converter to create digital negative copies of your images.
Thanks for clearing this up, Jim. Would you recommend that I upgrade to the latest version of Elements, rather than to version 9?