Mescalamba: That's weird. Gmail registration passes through without problem.
I am not sure why they started all that registration download nonsense.
I tried to install it on Win machine about 5 years ago and it wouldn't install - they never listed requirements but setup failed if CPU wasn't adequate (something Lightroom, ACDSee, CaptureOne, DxO etc never worried about) so I thought it was a joke.
Version 4 is rather ok. It doesn't have distortion correction, but you have interesting way to control HSL and RAW parameters - the editing can be stacked similar to layers.
I.e you add one "Relight" and modify Red data, then add another one and modify Blue...etc..
It seems to fail to embed profiles into rendered TIFF.
I think they still have at least 2-3 versions to go before they got a decent software, but atm is not all bad.
I can DL a version 4 for you if you want.