yes, you can. cdp7 doesnt touch cdp 6. i also have version 6 installed but i will keep it. its not taking much space and you never know, if there may be some bugs in one or the other program before testing it for a time. if you remove cdp 6, dont forget to backup all your worked on sound- and textfiles first...(if you are like me and like to keep them way too long inside the cdp directory ;-)