Well signing on to ask a question is why this forum exists, so there's no need to apologise!
Does this only happen with a specific file? (Can you create a brand new file and get the same behavior?)
What are you doing exactly just before it "hangs"?
Is there a script that's running when it hangs?
Generally it hangs when I have the window minimized, so I can work in another program. I try to restore the window, and nothing happens. Trying to close the program by right-clicking on the taskbar icon is also ineffective. Task Manager then tells me the program is 'not responding'. Duh :) I can force a quit and re-open the program and all is fine until it does it again. Doesn't seem to be database dependent, but I might be wrong on that. No scripts running.
Have you tried creating a small File with just a few fields and tested it to see if you get the same problem?
Do you have a different computer you can test this on to see if the issue is only with that computer?
Also, there's a free updater you can download from FileMaker to update 11.01 into 11.02. I don't think that'll solve your issue, but it would keep you up to date.
Assuming you are having no problems in other progams...
The database is on your computer, on your harddrive, not a USB or network or ....
The Filemaker program is opening a database on your computer?
This question is simplistic, your answer will be, also.