I just got a new laptop, a Lenovo Z710 running Windows 8. I downloaded Unity version 4.2.2f1 and opened some of my old projects, and everything works fine. I have a project that was using 2D Toolkit that failed to open. Unity crashed before the scene would come up. I don't recall which version of 2D Toolkit was in that project. I bought it a few months ago, I think, when it was on sale.
I registered my copy on this forum and downloaded the latest versions and tried to import them one at a time. 2.2.3 & 2.2 final, and in both cases I also tried the source only version.
In the case of the source only versions, everything appeared to be downloading properly until "Importing Small Assets". At which point Unity crashes with the "Unity Editor has stopped working" dialog.
Between each attempt I would delete the TK2DROOT folder from the otherwise empty project.
In the case of the 2.2.3 full package, Unity crashed while attempting to import "TK2DROOT\tk2d_demo\democameradata\source\window.png".
If I uncheck the "TK2DROOT\tk2d_demo\" folder and attempt to import, Unity crashes at "TK2DROOT\tk2dUI_demo\Assets\Dark\Sprites\slider_button.png".
If I uncheck both the "TK2DROOT\tk2d_demo\" and the "TK2DROOT\tk2dUI_demo" folders, Unity crashes at "TK2DROOT\tk2dTileMap_demo\Demo1\Textures\smallPlantIcon.png".
If I uncheck every demo folder, Unity crashes at "Importing Small Objects".
I've gotten the same results with 2.2.3 as with 2.2 final.
I'd appreciate any suggestions you have that could fix this. It's possible that it's a hardware issue, as I'm not yet familiar with the quirks of this new laptop, but I haven't had any crashes on any Unity projects I have that aren't running 2D Toolkit.
If the answer is to download an older version of Unity, that could be acceptable.
Thanks for your help.