Forum Post: LumenRT 2015 livecube won't open in LumenRT 2016

I have a LRT file created from Microstation to LumenRT 2015. It won't open in my current LumenRT 2016. I urgently need to update an animation - how do I get it working again? Re-exporting from Microstation is not an option as too much time has been spent setting up the animation and importing objects in the LRT file. Thanks, Max