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UPGRADE

Upgrading to a newer Z-Push version follows the same path as the initial 
installation.

When upgrading to a new minor version e.g. from Z-Push 1.4 to Z-Push 1.4.1, 
the existing Z-Push directory can be overwritten when extracting the archive.
When installing a new major version it is recommended to extract the tarball 
to another directory and to copy the state from the existing installation.

IMPORTANT: It is crucial to always keep the data of the state directory in 
order to ensure data consistency on already synchronized mobiles.

Without the state information mobile devices, which already have an ActiveSync 
profile, will receive duplicate items or the synchronization will break completely.

Please also observe the published release notes of the new Z-Push version.
For some releases it is necessary to e.g. resynchronize the mobile.