Thank you for your elaboration. I understood the first half of it. I am certain that I don't make joy to the platform when I out myself as a low educated user. My wish probably wasn't explained well enough. Yes, I would like the time to go on but with every sessions I would like to be in a time window for a trial software to be working. The company behind this software is long gone but the software has certain aspects that no competitors provide. The last straw I have is an old trial version which works for 14 days.
So I would like to start the VM, use the software, shut it down and want to move on on these projects later.
Isn't the vmx-file entry posted by bluefirestorm exactly what I need?
Thanks
David