Below is the image to show a Generic class of Type T in the UML Class Diagram.
I could not figure out how to add the T Template Box on top of Generic Class (set in the Image) using Star UML.
Is there any way in Star UML to add this Generic Type T box on top of a Generic class?
For the Derived Classes of this Generic Base Class, I have already added <<bind>> stereotype with the types that they use.

I'm using version 2.7.0, and you can add Template Parameter to the target class to indicate Generics.
Details: After you add a class or an interface, right click the diagram, and then choose Add->Template Parameter. You can edit the template parameter(or generic type) at the top-right of your class or interface.