Jobs & Education2 mins ago
How to completely delete files
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For more on marking an answer as the "Best Answer", please visit our FAQ.The file that tells your software that your trial period is over will be somewhere else on your PC, probably somewhere in the System folder, with possibly even an entry on the registry. As you've discovered uninstalling & reinstalling won't make any difference even if you've completely deleted all the obvious program folders. You would have to know precisely which file it is to be able to delete it. Whatever you do, don't try & guess which one it is - that could cost you a lot more than the price of paying for the software.
The only thing you could try is to change the system date on your PC (backdate it to a date before you first installed the program). Don't be surprised if they haven't already thought of that though...