[TxMt] Disabling entire bundles doesnt persist

[Carpii UK]

I open the bundle editor, select a bundle (such as AppleScript), and then
untick 'Enable this item'

I then hit CMD-S to save, and at this point AppleScript disappears from the
Bundle menu (which is what Id like to happen)

However, on quitting TM and relaunching, the AppleScript bundle is enabled
once again.

Using build build 2.0-alpha.9515

Is this a known issue, and is there a workaround?

Thanks
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