Windev Mobile 22

I am doing the windev mobile 22 tutorial - newbie . I am trying to generate the android application - I have installed the gradle tool set, and that looks fine. I have install the Android Sdk, and can look at it through explorer, looks like to me. Not to windev mobile. It keeps tell me that
>> The direction contains no Android SDK
Find the SDK in the sub-directories of the specified directory ?
<<
What file is it looking for to identify a directory as having the Android SDK in it ? I have several under program files (x86)\android\android-sdk\build-tools... and here I have \23.0.1 , \23.0.3 , 25.0.3 - but none of these makes windev mobile happy ? Any ideas.

Thanks

Don (not the hurricane)