I am interested in this, too.
Based on some Notes, I think the ADT-UI5 program is called GSEG_UI. So i tried to execute the UI5 download program, but run in an exception:
1. SE 38
2. program /UI5/UI5_REPOSITORY_LOAD
3. Download Application "GSEG_UI"
--> Runtime Error "A character set conversion is not possible".
Some files have been successfully downloaded. It seems to be to the right project.
Any ideas how to solve the runtime error?