Check Apache Tomcat Migration Guide http://tomcat.apache.org/migration.html for compatible Java version.
Go to task manager, click service tab and stop current version of Tomcat.
Go to http://tomcat.apache.org to download Tomcat version 7 or 8, choose to download windows’ installer file (.exe) not the zip file.
Run the window’s installer to install newer version of Tomcat (this example is for version 7)
Tomcat Basic Configuration:
Choose the path of compatible JRE on your system:
Choose the install location (this example is for Tomcat 7)
Finish Tomcat installation:
Open task manager, make sure freshly installed Tomcat is running, which indicates the successful installation of Tomcat.
Stop Tomcat service, run “Define Data Source & Deployment Tool”, point “ServerHomeDirectory” to freshly installed Tomcat.
Finish the deploy processing:
Start fresh installed Tomcat, then Check the content of target directory %CATALINA_HOME%/webapps/ew to ensure the successful CMEW Deployment.
Launch CMEW and check if everything is running correctly.