Some versions of Illustrator show the word ‘tryout’ on the welcome screen. It is only an image (png) that loads on start-up, nothing else.
If you don’t see the trial countdown showing how many days left before the trial expires, then it means it all worked fine and Illustrator is full version.
If you see the trial countdown reminding you the days left and you are sure that you have replaced the amtlib file correctly, please log out from Adobe and the countdown shouldn’t show any more. You can log out from Adobe via creative cloud manager and within the program on the help tab or via preferences or services menu.
If the problem persists please see our other FAQ’s