• 1. Download the new Railo 4.x JAR files
• 2. Stop Railo's servlet engine (Tomcat/Jetty/etc)
• 3. Replace existing JAR files with new JAR files.
• 4. Remove ehcache.jar, railo-sl4j.jar and slf4j-api.jar files.
• 5. Configure the REST servlet mappings.
• 6. Start Railo's servlet engine (Tomcat/Jetty/etc)
• 7. Use the Railo Update facility to ensure you have the latest patch and JARs.