You are not the first person to suggest there is only one version. PhotoLab 7 is available in both an Elite and an Essential version. If an Elite version is later released, but is not available now, as I am using Elite when available, would DxO demand additional payment for an Elite version of the same release when such a version is later made available? dop file that might no longer work with PL N but only PL N+1. dop file produced under PL N would not necessarily be compatible with PL N-1 but would be under PL N+1, with a resulting. My understanding of the PL series is that it is not backward compatible, so I must make a fresh subdirectory in which to put the NEF files that I wish to test.