Have a look at the Creative Cloud Photography Plan if your computer meets the system requirements.
You pay a monthly subscription for 12 months.
thanks but my point was that I can buy that regardless having already a lightroom license.
is there any upgrading (and less expensive) option to do that?
You can buy the regular stand-alone version at the upgrade price Use 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