A few times each year my export preferences just automatically change. I assume they just reset to the default ones, perhaps when an update happens. I often notice this right away as the images display differently, but sometime I miss all the changes. Recently I sent files to a printer and was dismayed to notice that the export quality for jpegs had recent the last time this happened had changed from 100% to 60% and I had missed this, causing me to have to reprint some itesm. Why does this happen? Is there a way to prevent it? Finally, is there a list of everything that might get reset when this happens so if I notice one thing that has changed I can go through everything and change it back?