You specify a program that works (for example) 30 days, and the program creates a shortcut on the desktop. Launching the shortcut you run my program that runs the desired program, and the programs that you need think of the last time the run took only 5 seconds. And then calculate how many times you can run "a trial" program, designed for 30 days, unless the launch of the "passes" only 5 seconds? I counted 518 400 times!