--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/UPGRADING	Thu Jan 04 15:50:29 2018 -0500
@@ -0,0 +1,82 @@
+UPGRADING instructions
+======================
+
+Follow these instructions if upgrading from a previous version
+of Roundcube Webmail. We recommend to carefully backup the existing
+installation as well as the database before going through the following steps.
+
+Using the update script
+-----------------------
+There is a shell script (for unix based systems) that does the job for you.
+To use it, unpack the archive of the new Roundcube version to a temporary location
+(don't replace the Roundcube installation you want to update)
+and cd into that directory. From there, run the following command in a shell:
+
+  ./bin/installto.sh <TARGET-FOLDER>
+
+For <TARGET-FOLDER> you specify the path to the Roundcube installation 
+which should be updated. The update script will then copy all new files to the 
+target location and check and update the configuration and database schema.
+After all is done, the temporary folder with the new Roundcube files can be 
+removed again.
+
+WARNING: See Post-Upgrade Activities section below.
+
+
+Updating manually
+-----------------
+If you don't have shell access to the Roundcube installation or if not running 
+it on a unix system, you need to do the following operations by hand:
+
+1. Replace index.php and all files in
+   - ./bin/
+   - ./SQL/
+   - ./program/
+   - ./installer/
+2. Replace the configuration defaults files:
+   - config/defaults.inc.php
+   - config/mimetypes.php
+3. rsync the contents of the following folders from your installation
+   directory into the target folder:
+   ./skins/
+   ./plugins/
+   ./vendor/
+4. Update dependencies:
+4a. If you previously installed plugins through composer, update dependencies
+   by running `php composer.phar update --no-dev`.
+4b. Install/update dependencies using composer:
+   - get composer from https://getcomposer.org/download/
+   - rename the composer.json-dist file into composer.json
+   - if you want to use LDAP address books, enable the LDAP libraries in your
+     composer.json file by moving the items from "suggest" to the "require"
+     section (remove the explanation texts after the version!).
+   - run `php composer.phar install --no-dev`.
+4c. If you use git sources or the release package without dependencies
+   update javascript dependencies by executing `bin/install-jsdeps.sh` script.
+5. Run `./bin/update.sh` from the commandline OR
+   open http://url-to-roundcube/installer/ in a browser and choose "3 Test config".
+   To enable the latter one, you have to temporary set 'enable_installer'
+   to true in your local config/config.inc.php file.
+   WARNING: See SQLite database upgrade below.
+6. Let the update script/installer check your configuration and
+   update your config files and database schema as suggested by the updater.
+7. Make sure 'enable_installer' is set to false again.
+8. See Post-Upgrade Activities section.
+
+
+Post-Upgrade Activities
+-----------------------
+1. Check .htaccess settings (some php settings could become required)
+2. If you're using build-in addressbook, run indexing script /bin/indexcontacts.sh.
+3. When upgrading from version older than 0.6-beta you should make sure
+   your folder settings contain namespace prefix. For example Courier users
+   should add INBOX. prefix to folder names in main configuration file.
+4. Check system requirements in INSTALL file.
+
+SQLite database upgrade
+-----------------------
+Versions older than 0.9 were supporting SQLite v2 only. Newer versions require
+database in v3 format. The best what you can do is to convert database file
+to the new format using command line tools:
+
+sqlite OLD.DB .dump | sqlite3 NEW.DB