Unreal Editor crashes on launch - how to reset/salvage a project?

I was working on a project, building a bunch of materials, saved the project, coming next day, after updating to 4.4.3 from 4.4.2 and get a 0.1 second flash of the editor with a bunch of green material boxes, then crash. This message every time I try to open the project. I would like to save some assets from that project, but it does not seem like they can be imported into another project.

Is there a way to reset or start an editor in safe mode, so it has all windows closed, thus minimizing the chances of crash?

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I found that I can import individual files into another project by selecting import from the file menu>all files > .uasset, this imports a file and related textures. Alternatively, I can copy/paste stuff from the content folder into the new project.

I have had this exact same bug after converting to 4.3. I have found a workaround but it is still really frustrating.

If you go to Config/DefaultEngine.ini and set
GameDefaultMap
and
EditorStartupMap
= to nothing. You should be able to load up your project with no map open. However you will not be able to load up your default map. I had two maps and if I loaded the non-default map then loaded the default map it opened fine. But opening up the default map made it crash again.

Despite this workaround it is really frustrating I’d really like it to be fixed.

This saved my life, thank you!