Hi Leo,
I have tried the following upgrade scenarios.
1. Windows 8 x64 host
WS902 with WS9 paid license --> WS 2013 TP July
Once launching WS 2013 TP July, I saw the dialog "Welcome to VMware Workstation". I chose 30-day trial. And WS UI reported accordingly. I think it is a correct behavior.
2. Windows 7 SP1 x64 host
WS 2013 TP May with TP license posted on the community, expire at Oct 15 2013 --> WS 2013 TP July
Once launching WS 2013 TP July, I did NOT see the dialog "Welcome to VMware Workstation". WS UI opened directly and reported the license will expire at Oct 15 2013.
As per my test results, I don't observe TP license is overriden by the 30-day eval on Windows hosts.
I am not sure whether the issue is Linux-specific. I will try it later.
Thanks.
Regards,
Sophia