3. Upgrade
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## 3. Upgrade

Starting from version 3.0, MeshCMS is composed of two directories: `/meshcms/admin` and `/WEB-INF`. To perform an upgrade, you should delete the current versions of those directories and use the new ones. Be careful not to delete the whole `/meshcms` directory, but just the `admin` subdirectory.

This upgrade strategy works fine in case of a simple usage of MeshCMS. In other cases the upgrade process can be harder. You probably won't modify the contents of the `/meshcms/admin` directory, but the `/WEB-INF` one is more likely to be changed. If you want to add an external application, or if you want to configure SiteMesh differently, you must keep track of your changes so that you can integrate them with the new release.

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