If you have gone through the Try process but it did not actually activate the demo license (which would happen when exiting the process, for example) and you go click the Try button again, you will run into the "Activated too many times" message.
If you encounter this, you will now need to instead proceed through the Activate path, and once asked to enter the serial number, click the No button, this will bypass the activate option and proceed to the login window. Then you'll be good to go.