Why do 2 windows - Fiji and Java - open?

fiji

#1

When I double-click to open a file (I’ve tried TIF, JPG, PNG), two iterations of the file open in Fiji - one with the Fiji logo, and another with the Java logo (see photo). This doesn’t happen if I open the file through Fiji (File > Open). This also doesn’t happen in ImageJ.
Any help is greatly appreciated. I need to open hundreds of files during in a session and I don’t want to waste time closing half of them.