I has no issues with drawing plantuml diagrams, but when I tried to use ELK I got this: java.lang.UnsupportedClassVersionError: org/eclipse/elk/graph/util/ElkGraphUtil has been compiled by a more recent version of the Java Runtime (class file version 55.0), this version of the Java Runtime only recognizes class file ...
Go toFile > Import > StarUML 1 File(. uml) ... And then select your file. It will appear at the bottom in "Diagram thumbnails" and then if you double click it, then it should open in model explorer. How do I use UMLet Tools in Eclipse?
Is there a way to tell the eclipse plantuml to use the classes exported by the JLatexMath .jar files? Regarding the license: the current JLatexMath uses GPL with a linking exception. So I hope that you could include it in your package. I would also be fine to install it by myself ...