This question, about 'automatic' updates, or similar wording, has frequently been raised in both the Software forum, as well as on the manufacturer specific forums (like Uniden, Whistler, etc). Your profile specifies you as a "Member", so your posts appears on the forums when you hit the Reply button, even though are still fairly new to scanners and these forms. 'Brand New' posters, classified as "Newbies" are moderated for content posted (to weed out spammers and other undesirables). In those cases, it may take some time, often hours, for the newbie;s post to be viewed by a moderator & approved to be posted. For those newbies, especially, rather than waiting an hour or more for their post to appear, if a few minutes were used to search the topic, they quite likely wiukd have had their question answered very quickly through previous posts by others.
Other than manually comparing your lists with the database, there is no 'automatic' option except with using specific software (ProScan) to find what changed. That's in my previous response.
As jt noted, you are a Premium Subscriber. You can set up your "My RR" page and designate which counties, trunked systems, and state agencies to watch. That creates a customized page, the first one you see when logged into the site. Agencies and trunked systems where a change has been made in the last 24 hours will be highlighted in green. If a change has been made more than 24 hours, butwithin the last seven days, will be shaded yellow. For conventional (non-trunked) frequencies, the name of the county where that frequency is used will be green for changes in the last 24 hours, and yellow if within the last 7 days.
Quite often, especially with trunked systems, the change may be a slight text or background setting, that has zero impact on how that item should be purchased. You are in Utah (per your profile), so you have a statewide system that may well be shaded green at times. But when you look at that system in the database, the change quite often will be in a different city and county, which do not require any changes in your settings. Look at the items changed. For 'background settings', on trunked systems, you will see no change on the page, so none will be needed on your part.