If you are running Version 6.0, 6.1 or 6.1.1 please see From 6.x to 6.2.
If you are running Opsview Monitor 6.0-EA (Early Adopters), we recommend that you first upgrade to 6.0 AU (Autumn Update); please follow the steps on the Upgrading from Opsview Monitor 6.0 Early Adopter page, and then follow the steps on From 6.x to 6.2.
If you are running version 5.4.2 then please see From 5.4.x to 6.2
Alternatively, if you would prefer to set up Opsview Monitor 6 on new hardware, please see Migrating to New Hardware
If you are unsure of whether doing an in-upgrade or a migration, please refer to Moving to Opsview Monitor 6.2?.
After an upgrade it is recommended you clear your browser cache for the Opsview instance you are navigating through in order to ensure the new features and functionality are being used from the upgraded instance, rather than the cache ones from before upgrade (which will cause problems).