Is the NRU backwards compatible. In other words I have to have Ver 10 for 6.1 and Ver 11 for 7. Will Ver 11 (NRU) work on old Norstar Versions like 6.1, 5, and even 4.x ?????
Thanks for any info.

Yes.

Thanks Sam.
Sorry I didn't get back to you sooner.
Busy, busy, busy.
I guess that is good. But it makes one crazy.
Thanks for the reply and info.