As mentioned above you can select for KeyVR to remember you. This way you will not encounter the login dialog every time you launch KeyVR. You can always log out via File > Log out and exit, which will clear the selection and next time KeyVR is launched, it will require login - or that the user selects to activate a different type of license.
You can find information about the active subscription license in Help > License information. This also holds a link to your account page on portal.keyshot.com where you can manage your subscription.