New major releases (versions 1.x) go through a testing cycle before they are shipped to all users:
Bugs that are found after a release has shipped, will be triaged. When they are serious enough, a patch (v1.x.y) will be released. If they do no affact too many users or if there is a work around available, they will be fixed in the next major release.
Any Centurial user can join the beta test team through the contact form. A couple of days before a new major release, you will be informed that a new version is available for beta testing.
The main goal of beta testing is to run some basic tests, to make sure the new release runs without too much problems on your laptop or PC. Installing the new version, starting it and creating a little project with a couple of sources should be enough. Also consider opening an existing research project in the new Centurial version.
You're welcome to test the new Centurial release more extensivelly, or to test specific (new) functionality as well, but this is optional. To this end the release notes will be included in the beta release.
New major releases are expected once every 50 days or so. As there are multiple beta testers, it is perfectly ok if you miss a release every now and then.