The directions for re-installing Pro for Workstations Edition are on the Download Windows 10 site. They say to install Pro Edition and then switch to Pro for Workstations via the Microsoft Store app.
Meanwhile, if you create an ISO from that same page and mount it in Windows, you will find a file named product.ini in the Sources folder of the ISO. This file contains generic Product Keys, which will not activate nor license the associated Editions of Windows 10. However, if you enter the generic Product Key for Pro Workstation, where it shows professionalworkstation=_____-_____-_____-_____-2YV77, in the change Product Key area of the Settings App, your device will upgrade to Windows 10 Pro for Workstations edition.
If you are already running Windows 10 S, Pro, Education, Professional Education, or Enterprise and some others, the change will be almost instantaneous. Your Windows 10 activation will vanish just as quickly. Home Editions will require a Restart and some install time, as it upgrades.
NOTE: Windows 10 Pro for Workstations will not activate, nor be licensed without purchasing a license for it via the Store app. I do not know what the price will be.
Also, there is no way to revert back to Home Edition aside from a clean install of Windows 10.
More info on switching Editions can be found here, although it is directed towards Deploying Windows 10 in an organization.