My version of Pixela 1.5 now gives the following problem. It has worked OK for three years. On starting Pixela I get the normal opening screen. When I click on 'Capture Envioronment' I get a small box running 'Creating time table'. This runs continuosly and locks-up the computer. I have to shut down and re-start. I have purchased replacement ImageMixer disc but installing this has not solved the problem. Help urgently required please