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Question: Invalid or missing license file

Question:Invalid or missing license file

Magn1227 10 Maple 2016
license activation system-time
October 31 2016
2

After changing the time and date on my computer, I get a message saying “Invalid or missing license file.” whenever I try to open Maple. I have tried activating it with my license code. It then gives me a message saying “Activation succesful! Please restart Maple for the new license file to take effect.”. After opening it again, I will once again get the original message. I have also tried reinstalling it twice. One time with the file my school provides, and with a file from Maples website. I get the same error message no matter what I do. 

I haven't been able to access Maple for several weeks now, so I'm getting a bit behind in math class.

How should I go about fixing this?
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