Hi Georg,
My apologies for not having informed about these changes before. Console.execute() is no longer available, as part of a complete redesign of PI's security system. A new way to run and communicate with external processes (similar to the exec() family of C functions) will be available in the next version of PJSR. So please be patient. Qt 4.7.2 (just released! Qt lives!) is compiling while I write this so everything is under active development.
In the meanwhile you can use the module you wrote around Qt to execute an external process. As soon as I have a new core application running with Qt 4.7.2 I'll start publishing updates.
Again sorry for breaking your script!