Hi,

First of all I would like to ask you to use approporiate forums - this is forum for v7 and you are using v6.

The best way would be to install a fresh Kentico instance (if not already available on the server) for given target framework version and the use export/import and then just import the site package on the target server.

Another option is to go with the manual backup and restore way - you will copy the web project files to the target (or, this can be done locally too) and open the project in the Visual studio 2010 - it will ask you whether you want to convert the project for .Net 4, you will have to modify the web.config file and change the system version numbers. More details in this KB article.

Best regards,
Juraj Ondrus