First to say:

IDE warning when a loaded module obscures another module (with same name) on the search path

new middle-click shortcut for
Go To Definition option from the context menu
Next: when executing a script, references to imports are solved by
- looking in the script's folder
- looking in the Vizard library folder c:\Program Files\WorldViz\Vizard5\python\
- looking in the Python library folder c:\Program Files\WorldViz\Vizard5\bin\lib\
So far so good.
now for the

part: when invoking the
Go To Definition command, this search path seems not to be used. More precisely, the file's folder is not searched.
[I found this as, for the moment, I have to obscure the shipped vizproximity module with my fixed variation. And when going for a definition, the IDE would always open the library file

, and not mine]
Best Regards, Walter