Having made some maps by querying OpenStreetMap last evening I went to bed after having saved my work. QGIS prompted me that there were some in-memory layers that would not be saved, but provided me with no further information on how to go about saving that data. Being tired I was unable to figure out what the prompt meant and closed the application after saving.
Waking up I find that all may layers are gone. Is there any way I can go about reconstructing them?