Blockstack browser error message

When I launch Blockstack browser on Mac OS Sierra 10.12, it opens as an icon in my menu bar. I can click on it and select among Home Ids Wallet Settings Quit. I assume Home is the standard start point to open a new browsing session.

When I press any of these, a new tab opens in Safari with the following error message:

Error: ENOENT: no such file or directory, open ‘/Users/MyName/Library/Application Support/Blockstack/portal/index.html’

It seems ‘portal’ is missing. Within the /Application Support/Blockstack/ folder there is only the config folder.

I tried dragging the Blockstack application to the trash and re-installing.