This weekend I implemented the source folder mapping. For every project you can configure test folder and corresponding source folder. It was quite a lot work to make moreUnit run again. Switching seems to work fine again. But there is still much more to do.
Additionally I got some user feedback about a preformance leak. Markus Gebhard gave very valuable feedback about some performance problems. So I invested some time to solve this problem and Markus started his profiler again => MoreUnit is a lot faster now :-)