Yes I did read your discussion. So to summarize, I would buy one crossgrade and install it on both desktop and laptop and use the USB e-lisencer to start and run the program on either.
I still have the question about backup. Can I purchase a second e-lisencer to minimize the situation of being on the road and forgetting it on my desktop? (though I recognize that can be misused as a way for some not to purchase a second lisence).
I have been around PCs since before 7/1981 IBM announcement (I go back to the early 70s on computers) and in addition my job when I was at Exxon was to evaluate hardware and software technologies so I have seen many ways that vendors have used to protect their property. With that said, I have never been a fan of hardware 'dongles' (as we used to call them in the 'serial' days). And they occupy a port, can get lost, forgotten and broken (don't ask me how many Gigastudio 4 USB keys I went through
In the last few years I believe the best compromise between vendor and user are the approaches by Apple and Avid which tie the software to specific hardware. And to move the license to different hardware you de-install from one machine and reinstall the license on another (and you are familar with that I am sure coming from Avid). Another useful approach is done by Pegasys (http://www.pegasys-inc.com
). I use their software in my videography business and the software every few times revalidates itself on a server (that is a bit problematic when I don't have internet access on a plane but I can start it before I board the plane).
Perhaps you can consider alternative approaches to having us install on a desktop and mobile machine without having to use a hardware solution.