herrtech,
No it is not. PC-Doctor 7 is designed not to lock to version 6 dongles. You can use the version 6 repair utility on version 6 dongles though.
You may also want to look into upgrading your existing Version 6 software to version 7. This would involve turning in your v6 dongle and receiving a v7 dongle. There would be a charge involved, how much would depend on when you purchased the v6 kit.
Please call sales at: 1-866-289-7237 they will be happy to sort out your options.
Thanks you very much for being a customer.
-Fred