Sorry for the delay (was for a week holiday in Vienna)
I do not remember rebooting after installation. oacapture is not working without problems. There is an image to see but scattered and pulsing. 
Below the last lines of the logfile:
Capture frame (/code/src/drivers/zwo_asi/asiimagingworker.cpp)
 WARNING - void ImagerThread::() ASI error TIMEOUT: timeout (code: 11) on Capture frame (/code/src/drivers/zwo_asi/asiimagingworker.cpp)
   DEBUG -  Refreshing ASI_TEMPERATURE if found..
 WARNING - void ImagerThread::() ASI error TIMEOUT: timeout (code: 11) on Capture frame (/code/src/drivers/zwo_asi/asiimagingworker.cpp)
   DEBUG -  Got raw control value for  Temperature ( 8 ) : value= 267 , is_auto= 0
   DEBUG -  Converting temperature from  267
 WARNING - void ImagerThread::() ASI error TIMEOUT: timeout (code: 11) on Capture frame (/code/src/drivers/zwo_asi/asiimagingworker.cpp)
 WARNING -  QThread:: Thread tried to wait on itself
   DEBUG - virtual LogScope::~LogScope() "Delete Object: ImagerThread"
 WARNING -  QThread: Destroyed while thread is still running
   DEBUG -  Imaging stopped.
 WARNING -  QObject:: Timers cannot be stopped from another thread
   DEBUG -  camera disconnected
   DEBUG - virtual LogScope::~LogScope() "Delete Object: Imager"