The crashlytics knowledge base says : "When building for release with Eclipse, export your application to an APK using the “Export Crashlytics-enabled Android Application” exporter from the Eclipse export menu."
But I couldn't find this option. Here's the link
Any help would be appreciated.
Never mind I found it. It's in File-> Export and under the Android folder, there's a new "Export Crashlytics-enabled Android Application" option.
Had a habit of exporting the other way so never looked here before.