I am having trouble inserting an image in Robohelp 10.

I am having trouble inserting an image.  I open the Insert Image dialogue box while in a Topic, and my cursor is on the Image Name field.  I then click on the Open File folder icon to browse my PC for the saved image.  After I click on the Open File icon, my PC is stuck.  I can't do anything except to go to Task Manager and end the application.  Help!