A word of caution: please rely on STS/Grails documentation for installation. We occasionally experience surprises in installation, so we offer this in hopes it helps you.
Find the proper STS installer here:
Create a workspace folder for BusLogicDemoGrails, eg,
First, open the workspace above, and proceed as described Grails STS Installation, to install the current production version. Use the options shown below (Help > Dashboard > Extensions: Grails, Grails Support).
You may also wish to select source control support, such as Subversive.
At right is an example of the install state after this procedure (click for full image size):
Architecture > Framework Integration > Framework Integration - Grails > Grails Demo Installation >