This bug was reported by Miklos via the users list:
it seems that you cannot open files from the command line with the latest release. I tried it with MitkWorkbench.
The command line arguments are processed by the activator of org.mitk.gui.qt.ext (LoadDataFromDisk function). But berry::Platform::GetApplicationArgs() returns and empty list there, hence no argument is processed, no file is opened.
Am I missing something?
I could reproduce this issue. However, if MITK Workbench is already running you can open new images via the command line.
e.g.
open command line with correct environment set
.\Release\MitkWorkbench.exe ..\..\MITK-Data\Pic3D.nrrd
-> Workbench opens, no image loaded
.\Release\MitkWorkbench.exe ..\..\MITK-Data\Pic3D.nrrd
-> Pic3D is added to the datamanager (provided you did not choose to start a new instance in the properties)