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IO pulled from build 276?
It appears that the IO data store objects have been pulled from this build. In addition to removing the stores from designer (they are no longer visible in the project inspector) it has also removed all the view objects as well.
1. When/will IO be back?
2. How can I get those view objects back in the mean time?
Sencha.IO will be re-integrated once the Sencha.IO team has upgraded the library to be compatible with the latest beta.
You may have to manually remove the binding to stores in the hidden .metadata/ folder in the mean time.