If you used the program once during the trial period then came back to it again for some reason or another after the trial expired, the trial worked exactly as

If you used the program once during the trial period then came back to it again for some reason or another after the trial expired, the trial worked exactly as intended: You want to use the program again, so it's asking you to pay up. I don't see the problem here other than "I don't want to pay for software." which isn't the programmer's concern. If you don't want to pay, the programmer likewise couldn't give a damn if you can't use his program.