Are you submitting the bug reports with the crash dialog? It helps if you have the debug symbols installed. (you can do it with the launcher using the drop-down arrow at the engine release button)
Is it still happening with the same project or does it happen with a new project aswel?
What happens when you open any demo project and try do the same operations you do at your project? Does the crash happen aswel?
Also important, which is the release you are using now? Which is the driver version for your graphics card?