**BUG**
Concise problem statement:
Try to download Gerber.
Get:
> {"head":"oldVersion","errorMsg":"EasyEDA has upgraded, please close
> your browser and open EasyEDA again to upgrade. If you have any
> problems, please click the help button to contact us!"}
Do:
> close your browser and open EasyEDA again to upgrade.
and try again: get same error message.
Steps to reproduce bug:
1.
2.
3.
Results:
Expected results:
Browser:
Brand new interactions and interfaces. 
Easy to use and quick to get started. 
