Now I am so scared to do any work..!!!
May be this problem is in the new build of AI2.
Wow!
I don't know why it happened all of the sudden.. I am glad that all these blocks can be expanded!!
Interesting. "Critical work" ... you mean you did NOT save an aia file regularly? or do a Project > Save project as.... ???? Incredible.
AI2 computing is "in the Cloud'.... AI2 programming assumes no memory issues on your PC, no network glitches, and not accidentally deleting blocks. There were over 100,000 AI2 users last month; only several unexplained 'glitches' were reported, however, disaster can happen, so developers should play safe. Save frequently, save an aia source file to your desk top often and have peace of mind.
Be sure to read the Terms of service: http://ai2.appinventor.mit. edu/about/termsofservice.html
To augment what Steve said above, please read the tips below:
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