Exporting profiles you put some work in to tweak settings to your liking is always useful in case anything goes wrong, you can do that by simply dragging them to your desktop from the config app.
As far as making them work with the beta there isn’t anything you have to do though, older profiles in the database just work as they did before.
You can also always reinstall the last official build in case something doesn’t work as expected at all with the beta version.