First off thank you for creating this, and also allowing 10 Free PC's after LMI left many of us hung out to dry.
You are welcome :)
my question is the Agent download, lets say my sister in California needs help with her PC and I have her run the agent file, I connect and log in and help her......doe this count against 1 of my 10 PC's?
Yes, Agent counts. In terms of licensing, Agent is no different from the Host. You can register the Agent just like you do with the Host - the license key is written into the same registry key as for the Host.
Or if I delete her out of my viewer does that take her out of my 10 PC's?
According to EULA a free license allows remoting to no more than 10 remote PCs, regardless of whether it's Agent or Host. Strictly speaking, if you plan to use the eleventh PC you must remove the license (which is applied on the remote side)/unregister the Host/Agent from one of the ten PCs, not just delete the record from the Viewer.
Hope that helps.