I have 2 Gb RAM (the maximum Windows will handle) and the largest .vue file is 70 Mb. It makes no difference what other programs I have running in the background. At first I was carefully closing down everything else, but this hardly delays the inevitable crash. The only thing is to watch the Options menu box to see what system resources Vue thinks it has, and close Vue when it drops to below 25%. Then reopen. This is not professional to release software with a serious memory leak. I don't know of any other app that I have to close down after every 20 operations and then start up again.