For normal VMs I would expect vmrun to still work.
There appears to be problems with shared VMs and the vmrun interface, is your VM perhaps a shared VM?
If it is a non shared VM then try inserting the "T ws" part in the command like:
vmrun -T ws stop "D:\Virtual Machines\Windows10-DB\Windows10-DB.vmx" soft
If that still doesn't work then try to run the command from outside the backup program in a command window and see if you get an error.
Wil| Author of Vimalin. The virtual machine Backup app for VMware Desktop Products
| Vimalin : Automated backups for VMware Fusion and VMware Workstation Professional
| More info at https://www.vimalin.com
| Twitter @wilva
| VMware Wiki at http://www.vi-toolkit.com
Thank you very much - editing helped!