I created the karel program with two arrays of string. After uploading the program and vr file to the controller I can edit the text variables in teach pedant, however, when the controller is turned on again, the values return to their original form (such as when the vr file was first loaded to controller).
In order to edit these variables, I choose the PC program and I edit it in DATA-> KAREL Vars. I don't understand why these changes don't save permanently after editing and turning off the controller.