I have recently switched from Aperture to LR5. That took a lot of work but appears to have been worth it. My new Sony A7R MkII produces .ARW raw files but LR5 will not accept them. There is an update for LR6 but not for LR5. Can I download LR6 safely? Will translate all my LR5 work? I cannot move to Creative Cloud as I do not always have access to a reliable internet connection (and that is sometimes very slow 3G or worse).
Yes. When you install LR6 you get the option to convert the existing catalog. You would qualify for upgrade pricing. You can buy from the following link. After clicking "Buy" change from Full to Upgrade; then select your existing LR product from the drop-down menu and the correct pricing will be displayed. Then simply choose “Add to Cart”
Or you can take a 30 day free trial via the Creative Cloud to test what’s new (some new features are only available to CC subscribers) and after the trial it’s possible to convert the CC version to the LR6 stand-alone version, upon purchase of a serial number and without any further installation. In either case make sure your computer meets the minimum system requirements.
Minimum system requirements