Download   If you are running a previous stable release, clicking 'Check for Updates' on the Plugins page is the preferred way to upgrade. If you are running a 6.4.0-rc, click 'Check for Updates' on the Tools/Update OS page.   This release contains important security updates related to the recent Meltdown and Spectre vulnerabilities.  For this reason, all users are encouraged to update.  We expect additional updates in the near future as additional mitigations become ava