Welcome Christoph Zwerschke!
As per our discussions, a few questions for everyone:
1. Should I bring back the top panel?
2. Dependencies. We have discussed this before, and I will start on it once I resolve the event issue with plugins:
DrPython, Python, wxPython versions required, and current plugin version:
DrFrame.SetDependencies(drpyversionstring, wxpythonversionstring, pythonversionstring)
Of course, the next step would be to show the installed version in the plugin install wizard,
and a Check SourceForge for Updates plugin.