I have been using Elements 5 without any problem for the last two years. Suddenly it has stopped working in Full Edit. I go through all the normal procedures to 'crop' and 'enhance lighting' only to find that the final picture informs me that 'Edit in Progress' but then it reverts back to the original unedited picture. I have tried re-installing Element 5 on the computer but this has not changed the problem. Is this likely to be an Elements problem or a computer problem?