...
If you enable the version checker, you receive periodic update notices as shown below. These notices appear when there is a major General Availability (GA) release. Click the version you want, then click Update to begin downloading.
You can enable automatic version checker in Report Designer if you did not enable it during installation. Go to File -> Settings and click Enable Version Checker:
By enabling the Notify me when (unsupported) development releases are available option, you receive update notification when there are development releases. These too will be in the list of available downloads. Keep in mind, however, that unsupported development releases may not have the full functionality and features available in General Availability releases.
If you opt out of the version checker, you can still check for updates manually. In Report Designer, go to Help -> Check for Updates:
...