When is the last time you updated/downloaded the database to your SDS100 (via Sentinel)? Last time it was updated - a week or two ago?
Then, look in RR to see if there have been any changes in your area - probably not, so, relax, Uniden will get around to putting out an update. Any changes probably don't affect you anyway.
Sentinel is the best way to update your radio - it has the latest data (when Uniden puts it out, and it's free, or included in the price of your scanner) and it's easy.
Access to RR so you can use it's data in Proscan, etc requires you subscribe to RR.