I have on one complete team viewer version 9 was installed and activated . I upgraded to the teamviewer to version 15 via check for updates option . After that it started showing free license .
So, tried activating it using the activate license in Extras option ...It asked for a sign in and after signed in I used the legacy license key option to upgrade . But still showing the free license.
Where as on another machine that had the activated teamviewer 9 was installed and and upon upgrading it was updated fine and not showing free license.
As far as I know teamviewer can be installed and activated on any number of machines but we can only use as per licenses ( Floating licenses)
What could be the reason.