John, please try "Menu => check for Updates => Advanced Options => Change Storage Location", then choose the removable Sd Card option.
Then if you ever have to reinstall, it should preserve these files. Upon reinstall, you'll again need to select "Change Storage Location => SdCard" and it should then restart and then find all of your data files.
Also, your other settings and flight plans, etc, as of 10.0, are now backed up to our cloud, and should give you option to "restore" after the reinstall.