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configurations for App Inventor for all
https://groups.google.com/forum/#!forum/ai4a
V1.4.6.zip is the current version. Use it unless you know what you are doing.
notes for bs 64. it is an older configuration
https://groups.google.com/d/msg/usgsuacwai/xYFZViW1XEg/7AgXfzJWf7IJ