[android-developers] Build Tools 19 no good. How to downgrade?

Apparently,

Build tools version 19 is broken.

https://code.google.com/p/android/issues/detail?id=61710

None of the workarounds worked for me.

I tried uninstalling Build Tools 19. 

Obviously that wasn't the proper way. Now it can't find any build tools.
Error executing aapt. Please check aapt is present at /android-sdk-macosx/build-tools/19.0.0/aapt   

How do I make it look for 18.1.1?

And no, gradle and Android Studio didn't work either. Too many weird things happen in the import. 

Nathan

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