lenswings,
somebody on the Flyer forum has had what appears to be a similar issue to yours. Tim Dawson of SkyDemon rapidly posted a response, which worked.
Originally Posted by Tim Dawson
It sounds like your browser has cached an out-of-date version of the SkyDemon Light software, probably dating back to the last test day. Try navigating away from the SkyDemon Light website, then using your browser's tool to delete all its temporary cached web files. Then when you go back to SDL it should download the latest version of the software, and that will itself download the latest chart when it starts.