licensing java-based NX Customizations

[gsal]

Hello:
First, let me say that I know nothing about NX...
I am just in the middle of an upcoming sale.
I just had a meeting where somebody showed me some NX Customizations written in Java which they then put into a *.jar file.

Question:
How would one go about protecting such customizations?

So far
I am already using WIBU AxProtect to license other programs, but those are actual binary executables.
The thing is that WIBU does not protect/encrypt plain text files or even bytecompiled...they would need to be actual executables.
I am kind of protecting ANSYS macros by first creating a dummy C program and an executable for it; then, I put a call to it inside the ANSYS macro and then encrypt the macro (with ANSYS itself).

Is there a formal way to do something like that in NX?
Or, any similar trick?

Thanks in advance for any hints.