OK Martin,
I just saw that there is now an "additional sensor definition line" at the end of the file, because there was already ONE at the end, now there are TWO (see e.g. post #25 of this thread) !
So, it's enough to delete just the last line in such a "new logfile", that it can be opened with the actual version 3.1 of "Generic Log Viewer". If I have time I will fix that, but the biggest problem is that I have actually no Visual Studio Development Environment ready (after change to Windows 10), maybe I can set one up in a Virtual Machine ...