this report has been filed here:

https://bugs.edge.launchpad.net/ubuntu/+source/brasero/+bug/302594

"The main startup window isn't opened after a burning cancellation. Here is my step-by-step operations (my Brasero is localized in french language, so I will use english translations which are not exactly the good ones, sorry):
- open Brasero
- get the main startup window
- select Data CD burning
- get the Data Project file window
- add any file you want
- click "Start burning"
- get the burning options window
- click "Cancel"
- return on the Data Project file window
- quit Brasero
- relaunch Brasero

At next start, Brasero reloads the Data Project file window, with all of the previous project content... Where has gone the main startup window? Where can we set the choice of the startup page, such as the choice between regular startup page and last used project (because Brasero doesn't ask us to save anything when we quit)?"

Thanks,