Problem taking screenshots. When I take a screenshot, Command + Shift + 4, then space key (or ctrl key), I can hear the sound of them being taken but I do not know where the screenshots go. In the past they went to the Desktop but not anymore. When I look for them using "Finder", tracing all files with screenshot in the name I do not find the recent ones (last month) on the list. It seems like they have not been saved.