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From the downloaded distribution, extract the /database/upgrade folder. This folder includes a number of migration*.sql files which upgrades the FlexDeploy schemas. You will need to execute these scripts from the version of FlexDeploy you currently have, up to the latest version. And they must be executed in that order. These For example, if you are upgrading from FlexDeploy 3.7.1 to FlexDeploy 4.0.3, you will run migration3.7.1_to_4.0.0.sql, then migration4.0.0_to_4.0.1.sql, then migration4.0.1_to_4.0.2.sql, and finally, migration4.0.2_to_4.0.3.sql.
These scripts should be executed as system, sys, or another user which has privileges to create objects in other schemas, performs grants, etc. You can load and execute these scripts using other tools such as Toad or SQL Developer, but the instructions here are for using the sqlplus client.
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