Hello Marcus,
In my github repo https://github.com/jmvedrine/qcreate forked from Exabis there is a branch called workinprogress (name say it all ) with the actual state of my work.
I think the "export good questions" will be working in a few days (it is already there but currently all questions are exported because I didn't had time to add the necessary code to lib.php in the qcreate_pluginfile function)
warning: files for backup/restore are here, but aren't finished so would badly crash if you try to backup/restore a course. My suggestion if you want to test the actual state is to simply remove the backup subdir.