//The following does not work:
dir = "C:/Users/steinr/ImageJ/Files/";
call("ij.plugin.frame.Editor.setDefaultDirectory", dir);
call("ij.io.OpenDialog.setDefaultDirectory", dir);
//saveAs path for both Text windows and images are set to the last used directory for saving

//The following works as expected:
dir = "C:\\Users\\steinr\\ImageJ\\Files\\";
call("ij.plugin.frame.Editor.setDefaultDirectory", dir);
call("ij.io.OpenDialog.setDefaultDirectory", dir);
//saveAs path for both Text windows and images are now set to the desired directory