Change project from mdi to sdi

Hello,
I am sorry it this is a duplicated question.
I was using the MDI example to make my application, but eventually I found that SDI type is most suitable for this app. Is there any fast way to chang the MDI project to SDI one directly? Since the source code is now large, it would be big problem if I re-start SDI project from the scratch.
Thank you!

There is no automatic way to do this. I your program is reasonably well constructed then it should not be too difficult to rewrite the top level behaviour to create the document widgets differently.