This has now been fixed. Mousing over the Load button will show the load options UI element. In this element, you can choose to load an RRO file or load a diagram from your browser's local storage.
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Related to issue #10.
I am working on this in a fork. I should have a pull request including a fix for this issue ready today sometime.
Last edit: Charles Hill 2015-03-02
This has now been fixed. Mousing over the Load button will show the load options UI element. In this element, you can choose to load an RRO file or load a diagram from your browser's local storage.