Thank You Thosrtanner the fresh install solved it not really: "[W] QIODevice::read: device not open" is not shown at the beginning. But with running implemented Loot to sort plugins espacially with the unofficial patches the message shows again. Edit: Now I have little idea what this message mean. After running the implemented Loot you got usualy a report in an extra window. I got no report, though Loot seems to work properly. Reinstalling with a new download didn´t fix it.