Started with Lightroom 5.4 and loved it. Upgraded to 5.5 because I kept getting messages to do so to fix bugs etc. Now it crashes all the time. Very difficult to export from program. After several pictures are exported I suddenly get the blue dump screen. Notice in other forums that this general problem is happening a lot. Can I go back to 5.4? Is this what I am to expect from these Adobe programs? It was a great program when it worked, now it is a huge frustration.