How to handle "An Item with the same key has already been added" when adding .jar to dot42 project

Question

I am trying to add a .jar library to a dot42 project. specifically Ksoap2-android. When I add it to a newly created project, I get the error "An Item with the same key has already been added". What causes this and how do I deal with it?

Answer 1

This issue is solved in version 1.0.1.81, now available for download.