open database upgraded to 2009 by dynamic nav 5.0

Hi guys i face one proplem one guy make upgrade to dynamic nav 5.0 to 2009 .Now when i open dynamic Nav to 5.0 version it tell me must upgrade are there are any way to open database with old version meaning open database with version 5.0.

thanks

Easiest way is to restore a backup. Do you have a backup?

Else read these to get you started:

http://www.mibuso.com/forum/viewtopic.php?f=23&t=42444

http://mibuso.com/blogs/ara3n/2010/04/09/downgrade-2009-sp1-objects-into-5x-or-older-databases/

http://mibuso.com/blogs/kriki/2010/03/24/downgrading-after-accidental-upgrade/

Restore the backup taken before upgrade happen of version 5 That can be open in version 5 it will reslove the problem

I hope you have backup

There is no way to open the upgraded database in 5.0 version again.

You need to restore the 5.0 backup again or update clients at all users and continue with 2009 executables…