Hello,

As I have checked in the official website of Oracle I saw that from JDK 11 there are two different versions that can be downloaded that is one which is  commercial that is JDK11 and the other that is just for free use named as OpenJDK11. So they are providing license but on different terms and conditions.

Now I think you should download the newer version because the older versions would not get updates and support on there on rather you would have to pay for it.

Hope it helps.

Good luck.