Apologies if this has been posted already. Found this info on Adobe's own forums. 1) Download & install Adobe DNG converter (free). 2) Copy your lens profile from C:\ProgramData\Adobe\CameraRaw\LensProfiles\1.0 to C:\Users\[youruser]\AppData\Roaming\Adobe\CameraRaw\LensProfiles\ This path is for Adobe-made profiles only. I was able to add an Adobe profile for SELP18105 to LR4.4, which wasn't shipped with it.