Windows Server 2012: how to unlock job.dpd file in a division?

We have XPP 9.2 running on Windows Server 2012. People, on Windows PCs and Macs, access XPP via Remote Desktop.

A user on a Mac via Remote Desktop was editing a division when their computer crashed, leaving a division locked. Now she can't edit the division because the job.dpd file is locked in that division. How do we unlock a file on Windows Server 2012?

The error message XPP sends is "Cannot access JOB - Files in use".

Thank you!

p.s. We have to use Macs, so there will be a lot of lockups.