source: github/UPGRADING @ b45aedd

UPGRADING instructions
======================

First you should remove all subfolders from /program/localization/
because most language codes have changed in 0.2-alpha. This way you
can make sure that no old localization files remain on your disk.

Then follow these instructions if upgrading from a previous version
of RoundCube Webmail.

1. Replace index.php and all files in
   - ./bin/
   - ./SQL/
   - ./program/
   - ./installer/
   - ./skins/default/
   - ./plugins/
2. Run ./bin/update.sh from the commandline OR
   open http://url-to-roundcube/installer/ in a browser. To enable
   the latter one, you have to temporary set 'enable_installer' to true
   in your local config/main.inc.php file.
3. Let the update script/installer check your configuration and
   update your config files as suggested by the updater.
4. If suggested by the update script, run all commands in
   ./SQL/[yourdbtype].update.sql that are superscribed with the
   currently installed version number.
5. Make sure 'enable_installer' is set to false again.
6. Check .htaccess settings (some php settings could become required)


For manually upgrading your RoundCube installation follow the instructions
that match the currently installed version:

from version 0.2-alpha
----------------------------------------
* replace index.php
* replace all files in folder /bin/
* replace all files in folder /program/
* replace all files in folder /installer/
* replace all files in folder /skins/default/
* run all commands in SQL/[yourdbtype].update.sql
  below the line "-- Updates from version 0.2-alpha"
* check the config/main.inc.php.dist for new configuration 
  options and add them to your config 
  WARNING: 'skin_path' option was replaced by 'skin' option
* WARNING: 'db_backend' option has been removed, now only
  PEAR::MDB2 driver is supported


from version 0.1.1
----------------------------------------
* replace index.php
* replace all files in folder /bin/
* replace all files in folder /program/
* replace all files in folder /skins/default/
* run all commands in SQL/[yourdbtype].update.sql
  below the line "-- Updates from version 0.1.1"
* check the config/main.inc.php.dist for new configuration 
  options and add them to your config 


from version 0.1-stable
----------------------------------------
* replace index.php
* replace all files in folder /bin/
* replace all files in folder /program/
* replace all files in folder /skins/default/
* run all commands in SQL/[yourdbtype].update.sql
* check the config/main.inc.php.dist for new configuration options
  and add them to your config 


from version 0.1-rc2
----------------------------------------
* replace index.php
* replace all files in folder /bin/
* replace all files in folder /program/
* replace all files in folder /skins/default/
* run all commands in SQL/[yourdbtype].update.sql


from version 0.1-rc1
----------------------------------------
* replace index.php
* replace all files in folder /bin/
* replace all files in folder /program/
* replace all files in folder /skins/default/
* If you have LDAP servers configured you should re-configure
  the config entries using the template given in /config/main.inc.php.dist


from version 0.1-beta2
----------------------------------------
* replace index.php
* replace all files in folder /bin/
* replace all files in folder /program/
* replace all files in folder /skins/default/
* run all commands in SQL/[yourdbtype].update.sql or
  re-initalize the database with [yourdbtype].initial.sql
* add these lines to /config/main.inc.php
   $rcmail_config['draft_autosave'] = 300;
   $rcmail_config['date_today'] = 'H:i';
* If you have LDAP servers configured you should re-configure
  the config entries using the template given in /config/main.inc.php.dist


form version 0.1-beta
----------------------------------------
* replace index.php
* replace all files in folder /bin/
* replace all files in folder /program/
* replace all files in folder /skins/default/
* run all commands in SQL/[yourdbtype].update.sql or
  re-initalize the database with [yourdbtype].initial.sql
* add this line to /config/db.inc.php
   $rcmail_config['db_persistent'] = false;
* add these lines to /config/main.inc.php
   $rcmail_config['drafts_mbox'] = 'Drafts';
   $rcmail_config['junk_mbox'] = 'Junk';
   $rcmail_config['product_name'] = 'RoundCube Webmail';
   $rcmail_config['read_when_deleted'] = false;
   $rcmail_config['enable_spellcheck'] = false;
   $rcmail_config['protect_default_folders'] = false;
* replace the following line from /config/main.inc.php
   @include($_SERVER['HTTP_HOST'].'.inc.php');
  with 
   $rcmail_config['include_host_config'] = false;