As a newbie in GIS, I didn't fail to make a newbie mistake. While editing a point layer I accidentaly deleted all the introduced data. I duplicated a layer, as it was more convenient (same style and attributes), but forgot to save it as a new layer before editing it and saving it. It resulted in the deletion of all the previously introduced points.
It appears nonetheless that the datas haven't totaly disapear. If I open for instance the related .dbf file with notepad, it still show the deleted lines (not the case in excell though). Same is true for the shapefile that weighs much more than the empty one I saved later.
Is there a way to retrieve the lost data and to make them reappear on the layer?
Thanks for your help.