On Windows 10 I spent a lot of time after install of v1.0.0 crashing it immediately by attempting to dock the tabs as I had them set up before. I am travelling so no access right now but wanted to post my issue in case someone can reproduce.
If I recall, the issue was dragging a window over an existing tab and releasing immediately, rather than (correctly) waiting for the pane to open up a space for me to drop the tab into (eg I wanted the layers info top left, with the properties bottom left, both in the same pane, both showing at once).
However, v1.0.0 is fantastic - it was like an early christmas as the new and unexpected features were just what I was hoping for. Thanks!