How to Upgrade 3CX to V18 December 16, 2021 December 15, 2021 1,065 views By tonylin Windows version 3CX upgrade from V16 to V18 requires uninstalling V16 version and reinstalling the V18 3CX. 3CX describes in the documentation how to upgrade to version V18: Login to the Management console and go to “Backup and Restore”. Take Read More How to Upgrade 3CX to V18