Before you begin searching on how to troubleshoot your issue, please make sure to look through the common recommendations.
Attention! Don’t use the driver to mount and write on hibernated NTFS disks (such as Boot Camp Windows in hibernated mode)! Doing so may lead to data loss.
Using Trial version? See this article:
Check out information about new features in NTFS for Mac 15:
Check out all information related to activation of NTFS for Mac 15:
FAQ Activation of NTFS for Mac 15
If you’re experiencing disk mount/write issues, see
NTFS for Mac 15 – FAQ Mounting Issues