We don't know exactly when it started, but all of a sudden we started having a problem renaming our existing photo files. We normally would right click on the photo and click on rename it and it would be no problem as it would change it right away. Now, when we right click on the photo and ask it to rename a box pops up and says, "If you change the file name extension, it may become unusable. Are you sure you want to change it?" What do we do?..... We need help.......