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In the past, moving an existing Velocity system to the next major release required an upgrade, which typically included some changes to the structure of the Velocity database. An upgrade was indicated by an increase in the major release number, such as from 3.5 to 3.6 or 3.7 to 3.8 or 3.8 to 3.8.1 or 3.8.1 to 3.8.2 or 3.8.3 or 3.8.4 or 3.8.5.
Starting with version 3.5, minor releases were called Service Packs. These updates could be applied more quickly to an existing system (within the same major release) using a Velocity Update Wizard (instead of the full Velocity Installer). An update was indicated by an increase in the minor release number, such as from 3.5 SP1 to 3.5 SP1.1 or from 3.6 SP2.1 to 3.6 SP3.
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Existing Velocity users moving from 3.6 or 3.7 to 3.8/3.8.1/3.8.2/3.8.3/3.8.4/3.8.5 use the Velocity Update Wizard. This wizard simplifies the effort required to upgrade and uses smaller installation files than the Upgrade Wizards provided for previous Velocity versions.
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