Question: Problem with license Maple 2015

Hello everyone. I took part in a project in which we had to solve problems with Maple 2015. The managers gave us a permanent license. However recently I had trouble on my computer and now Maple doesn't work anymore because it somehow lost the license. The project ended last year, so I can't really ask them anymore. Is there any way to get the license working again? I checked on the site but didn't found anything useful and I'd really need it for the final exam of the last year of high school...

Thanks in advance!

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