Personal Web IDE & UI5 SDK config make local develop possible

I have download the personal Web IDE and UI5 SDK in my own PC disk.

How to config the Web IDE to make Tag src point to the local UI5 SDK not the Internet？

<scriptid="sap-ui-bootstrap"src="https://openui5.hana.ondemand.com/resources/sap-ui-core.js"data-sap-ui-theme="sap_belize"data-sap-ui-libs="sap.m"data-sap-ui-compatVersion="edge"data-sap-ui-async="true"data-sap-ui-onInit="module:sap/ui/demo/walkthrough/index"data-sap-ui-resourceroots='{
			"sap.ui.demo.walkthrough": "./"
		}'></script>