IntelliJ IDEA 14.1 problems with SBT projects

I upgraded to the latest IntelliJ IDEA 14.1 EAP build 140.2110, and when it tries to open my SBT project it just hang.
I tried re-intalling it, but no success. I tried to start it without opening a project, in this case it progressed to the main screen.
I then tried to get the SBT plugin, but it said it was imcompatible with the current IDEA version.