If you are upgrading within the same minor version number of Wing (for example from 6.0 to 6.x) this will replace your previous installation. Once you have upgraded, your previous preferences and settings should remain and you should immediately be able to start using Wing.
If you are upgrading across major releases (for example from 5.1 to 6.0), this will install the new version along side your old version of Wing.
New major releases of Wing will read and convert any existing Wing preferences, settings, and projects. Projects should be saved to a new name for use with the new major release since they cannot be read by earlier versions.
To install an upgrade, follow the steps described in Installing
See also Migrating From Older Versions.