No, your current license guarantees that you will get a free update to support macOS Sierra commercial version. However support of all succeeding macOS versions is not guaranteed. It is available in your MyParagon account. Should I buy the Lifetime Upgrade Assurance for each of them? Yes, you can buy Lifetime Upgrade Assurance for each of your licenses, if desired. However, you cannot use the same purchase link, because the Upgrade Assurance is only exclusively available for users of NTFS for Mac 14 and for 1-time purchase only.
Write Access When a volume is mounted in write mode, you can do everything with the files and folders it contains: However, this feature can be disabled at any time in the program interface. Check out the Paragon Technology Portal!
How To Install Paragon NTFS 15.0.911 Complete Version for macOS Sierra & High Sierra