My problem is as follows:
I imported a number of shapefiles from a .gpx-file from a gps-device. Each shapefile contains a number of waypoints. For the study I am doing, I need to give all of them unique ID's. I simply selected each shapefile, toggled the editing-switch and changed the name in the attribute table's name-column. Though for some reason, I cannot toggle editing of two of the 20 shapefiles. All of them have the same coordinate system as the project, so I don't understand why I cannot find the solution.
I am still in the rookie-phase of using GIS, so I might have overlooked some obvious solution. I hope someone here can help me.