Version 7 can open version 6 profile and tipload files. You may need to prepare version 7 though.
If you have edited the standard version 6 database it will probably be simplest to migrate your version 6 database into version 7. This is a one-off procedure and overwrites the existing version 7 database with version 6 data.
The migrate function is found under the Windows Start menu. You can migrate the database and as a separate function you can migrate the options from version 6.
To open version 6 tipload and profile project files (saved with extension pnw) open the tipload or profile module in version 7 as appropriate then use the File>Open menu function.
You cannot save projects in version 7 as a version 6 file.