iDVD keeps crashing!

I have the latest version of iDvd (7.1.2) running on Yosemite. I have tried all the solutions offered on other similar forums, i.e. removing the preference files and cache files and I've also tried running it under a different user but it still crashes. Sometimes it crashes with a prompt from 'Atos requires a password' which seems to be a different issue altogether but in the most part it crashes as soon as I start adding media to the template. Any ideas people??