Thank you for your post.
Are you launching FileMaker Pro 11? Or, are you double-clicking on the database file that launches Filemaker Pro 11? If the latter, see if there is a Startup script, or if the file is referencing other database files.
What other applications are running on the computer? Do you have access to another machine? If so, can you install and launch FileMaker Pro and see if the launch time is the same?