1. Go to "Preferences -> Install/Update -> Available Software Sites". You can also use "Help menu -> Install New Software -> Available Software window -> Available Software Sites link".
2. Click on "Add" button to bring the "Add Site" window, enter URL 'http://twist.thoughtworks.com/update-site' and name 'Twist Update site' and press "OK" button. You will see that this new site is added to your list of Update sites. Ensure 'Twist Update site' is checked amongst 'Available Software Sites'. Close the preferences window.
• If you already had the update site registered, you may to have to "Reload" the "Twist Update site" entry from the "Available Update Sites" window.
3. Similarly, if you are using Twist with Groovy, you can add 'Twist Groovy Update Site' to 'http://twist.thoughtworks.com/groovy-update-site' like above. Refer here for more information.

1. Click on the help menu and select 'Check for Updates'
2. This will open the Updates window with a list of pending updates from the site we just added
3. Under 'Uncategorized', select/check twist.
4. The install button should now be enabled, click it and follow the instructions to update.
5. If you are using Twist as a plugin on Eclipse, then choose 'Twist Feature', under the 'Twist Feature' category and not the 'Uncategorized'
6. After the upgrade process, Restart Twist when prompted.

Twist 2.4 comes bundled with upgraded Spring 3.1.0 libraries. For new projects, the generated application context files, applicationContext-suite.xml and applicationContext-scenario.xml, are Spring 3 xsd compliant. While your older projects' (Twist 2.2, 2.3) confiugration files are backward compatible, you should consider moving to new schema. To do this, you can just open the application context files and replace the schema definition section like below.

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:lang="http://www.springframework.org/schema/lang"
       xmlns:context="http://www.springframework.org/schema/context"
       xsi:schemaLocation=
        "http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd
          http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang-3.0.xsd
         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
        

From version 2.3 onwards, Twist supports Selenium 2 (WebDriver). In order to be able to use the new driver, you will have to install it explicitly. However, this is an one-time activity, and thereafter you can perform the usual "Check for updates" as explained above.

When Twist is installed as a standalone product, do the following:

1. Add 'Twist update site' as explained above.
2. Go to "Help menu -> Install New Software"
3. Select 'Twist update site' from the combo drop down
4. Uncheck "Group items by category", click the "Select All" button and click the "Next" button to proceed with installation.
   
   Note, if Twist is installed as a plugin in Eclipse, you don't need to uncheck "Group items by category". Just "Select All" and proceed with installation.

From Twist 2.2 onwards, you can get the driver updates independently from core Twist features. Hence, the upgrade process is slightly different from usual "Check for updates". However, this is an one-time activity, and thereafter you can perform the usual "Check for updates" as explained above. When Twist is installed as a standalone product, do the following:

1. Add 'Twist update site' as explained above.
2. Go to "Help menu -> Install New Software"
3. Select 'Twist update site' from the combo drop down
4. Uncheck "Group items by category", click the "Select All" button and click the "Next" button to proceed with installation.
   
   Note, if Twist is installed as a plugin in Eclipse, you don't need to uncheck "Group items by category". Just "Select All" and proceed with installation.