After restarting Sourcetree, It always goes back to the default "Generic Account/Generic Host" despite having previously selected my own github account and saved. This applies both to the Upstream and Origin settings.
As you can see, the world icon (Remote) on the top right has a red mark, which goes away once you have selected your own github account as mentioned above, but it comes back after restarting.

[Screenshot|https://pasteboard.co/JgYEp4G.png]

Happens on 3.3.4.