Why there is no UML tab in JBuilder X developer?

I have just started to use JBuilder X Developer Evaluation edition. And to
my surprise, I did not see UML tab there (I did see Source, Design, and other
three tabs there). So is it that I did not do something right, or the software just
does not have UML tab (A JBuilder Enterprise book did mention the UML tab.)?
I hope the UML tab is not solely for JBuilder Enterprise Edition. Please help
me to clarify the myth. Thank you.

I have never used JBuilder, but I have heard from a lot of people that dislike it! Personally, I use TogetherJ for UML, but I don't really like the fact that it ties your diagrams to code that it generates behind the scenes, and also it is not free. ArgoUML is very good (and free), and doesn't constrain you as much (there are arguments for and against this). I appreciate that you might want to use JBuilder because you are used to it, but I am writing this follow-up in case you don't know of any other tools that can create UML diags ;o)

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