If you signed up to be a beta tester, you should have an email from Apple and one from us telling you how to get Beta 1. As the email says, Beta 1 is focussed on the new ADS-B weather products and Altitude Slider. It does not include the Timeline or the new weather layers from the Internet (just ADS-B). We expect to have a beta with those additional features out this month.
Also, the 4.5 release will include a legend for what all the new layer colors and symbols mean. It’s not in this beta, however.
As you probably know, version 4.5 is all about dramatically improving the weather features in FlyQ. That means adding the new ADS-B weather products, tripling the number of weather layers from 7 to 21, and adding an Altitude Slider and a Timeline.