The SSMS 18.x installation doesn’t upgrade or replace SSMS versions 17.x or earlier. SSMS 18.x installs side by side with previous versions, so both versions are available for use. However, if you have a preview version of SSMS 18.x installed, you must uninstall it before installing SSMS 18.4. You can see if you have the Preview version by going to the Help > About window.
SSMS 18.6 is the latest general availability (GA) version of SSMS. If you have a previous GA version of SSMS 18 installed, installing SSMS 18.6 upgrades it to 18.6.
- Release number: 18.6
- Build number: 15.0.18338.0
- Release date: July 22, 2020