Drools Runtime is required to instruct the editor to run the program with specific version of Drools jar. You can run your program/application with different Drools Runtime.
Click on Windows → Preference → Drools → Installed Drools Runtime. Then click on Add as shown in the following screenshot.
Thereafter, click on Create a new Drools Runtime as shown here.
Enter the path till the binaries folder where you have downloaded the droolsjbpm-tools-distribution-5.3.0.Final.zip
Click on OK and provide a name for the Drools Runtime. The Drools runtime is now created.