Is there a way to downgrade a project to 3.5?

After upgrading the Unity 4, I am constantly battling crashes when running on the device (iOS).

Until the team at Unity fixes things, I would like to downgrade my project back to 3.5.

Is there a way to do so?

I should mention that I am using .meta files version control, if this helps.
I do have an older version of my project, but I have done some progress since and prefer not to rollback using my git repository.

No, can’t downgrade.

Revert to an old version, probably should have tagged/branched when you upgraded. If you have the change history, after revert, merge what you can.

Ya, 4.0 has some weird differences, such as disable the collider and stuff.