Unreal 4.14... don´t build...

Well, I updated to the last version, and when I push “build” button, Unreal crash allways, I have the next problem, now I can´t open my project in old versions because was saved in 4.14 version, and I can´t render… Any suggestion?..

I personally keep multiple versions on my computer, specifically if I have to go back to older projects. Most I can say is to reinstall 4.14 and install a separate version that will run your other projects.