>I see. How do I release it from the client app?

What do you mean - normal or forced release?

For normal release you need to release an object reference of server instance just like you release VFP objects.
If you use variable to store the reference like:

loServer = CreateObject("My.Server")

Then you need to release the reference like:

RELEASE loServer

- or -

loServer = Null

If you use an object property then you need to set it to .NULL. (or any other value but Null is usual).

Ensure that there are not other variables or properties which contain the reference, otherwise it will be not released.

As for forced release you need to add appropriate method to server, but this is not recommended because other clients will lose connection to server.