abbonoment? I do not know what you mean by that. However you will need the installation file for Lr 6.14 as instructed in an earlier post. The License key for the application, if this is a new computer, and you will need to go online to Adobe dot com and login to the account you used to originally registered your product. Lr 6 is the only version that utilized the license key to activate. and you are only allowed to have two computers activated at any point in time. This is closely monitored by Adobe.
If you already have two computers activated then you will have connect to your a/c to deactivate, before attempting to activate another unit. If you have a problem you need to contact Adobe support via chat or telephone. Best of luck.
Regards, Denis: System iMac mid-2015, 5K 27” monitor, macOS10.15.7: LrC 9.4, Lr 3.4.2, Ps 21.2.4, Camera OM-D E-M1.