Not sure what is going on there, but if you want a new arrange window (not a new project), you can hold down the COMMAND key and hit the number 1 on your keyboard and it will open a new arrange window. Is this what you're trying to do? Or do you mean you actually want to create a second project and have it open at the same time as your current project?
That is very strange. So you say it didn't do it on 9.1.6?
Try this, create a new user account. Log into that user. Then try start up Logic, and see if it does the same thing. This will narrow it down if it is a user issue, or system issue.
Thank you Morry for you reply.
Yes I want to create a new project because I am not ready with the current project but a have to record a new song. Command 1 give me a copy of my current project.
( I am bad in English sorry. Hope you understand my problem)