Cocos Studio android build failing after re-install

Somehow my cocos studio build was corrupted, After reinstall when attempting to build an apk

I get the following error:

BUILD FAILED
C:\Cocos\tools\android-sdk-windows\tools\ant\build.xml:483: SDK does not have any Build Tools installed.

lines 481-483 of build.xml are

<target name="-build-setup" depends="-setup">
    <!-- find location of build tools -->
    <getbuildtools name="android.build.tools.dir" verbose="${verbose}" />