I'm sure this is a simple issue and I just don't know enough to go to the right place. I keep losing downloaded files. For instance, I just downloaded a Plymouth theme file online. The download went just like I expected, and after the download the notifier with the file popped up showing the file in the download folder. Yet when I opened Dolphin to extract and copy the file where I needed it, it wasn't in the download folder. I went to the home folder and from there it directed me to my folder (capt-zero). I opened my folder, saw the downloads folder, opened it, but the file wasn't there. Like many files to download, the name is contracted so I don't have the complete file name to "locate" in the terminal. Many of the 'download' files that show up in the pop up window are where they are supposed to be, but the one I just downloaded isn't there. I went back and downloaded it again. When the notifier popped up, again it showed the download along with earlier downloads that do show up in dolphin. Once again, I can't find the file I just downloaded. This happens often.
In a similar vein, there are wallpapers I've downloaded from 'Deviant Art' that don't show up when I try to open them from my 'Desktop Settings' app, yet they are visible from Dolphin. Any ideas?