You must upgrade the CICS Explorer® to Version 5.2 before you can connect to CICS® regions at CICS TS Version 5.2. When you upgrade CICS Explorer you can use it to work with CICS TS 5.2 regions, and also with other CICS TS regions that are not yet upgraded.
For CICS Explorer Version 5.1.1 and later, you can use the facilities that the Eclipse platform provides to update your CICS Explorer, or other software, or add new software plug-ins, such as CICS Tools.
The update site for the CICS Explorer is already coded in the product. The site address is displayed on the Installed Software page in the Software Updates window. If you choose not to use the composite update site, you must specify the address of your preferred update site, which can be either on your local workstation or a remote location. You can add multiple update sites, each containing one or more software downloads.
For CICS Explorer versions earlier than Version 5.1.1, you must install a new copy of CICS Explorer. You cannot upgrade in the way described earlier because earlier versions of CICS Explorer use a different version of Eclipse than CICS Explorer Version 5.1.1. Before you install the new copy of CICS Explorer, it is advisable to back up your CICS Explorer workspace so that you can restore the workspace to a previous version, if required.
For more information about upgrading CICS Explorer, see 
Updating and installing software in the CICS
Explorer product documentation.
