Photoshop does not retain Measurement Scale functionality after upgrading to Photoshop CC 2018

The machine this concerns serves a single purpose in my organization, for which the application of custom-written measurement scales is integral.

The machine has recently seen Adobe's applications get upgraded, now on Photoshop CC 2018. This upgrade did not successfully migrate the relevant folder structures required to make the measurement scales function as before. The location of this should be under AppData\Roaming\Adobe\Adobe Photoshop CC 2018\Adobe Photoshop CC 2018 Settings. Within this Settings folder lives the Measurement Scales.psp document that is crucial to our functionality.

These folders were not getting created, and after a LOT of troubleshooting, only skeleton folder structure with no functionality was created.

Troubleshooting steps undertaken so far have included the following:

• Upgrading
• Uninstalling and reinstalling Photoshop
• Uninstalling and reinstalling both Creative Cloud app and Photoshop
• Uninstalling and reinstalling Photoshop with company-wide admin account
• Manually creating folder hierarchy and placing template within it
• Reinstalling Photoshop CC 2015 and then upgrading that to CC 2018 - This is what created unpopulated skeleton folder structure
• Ran Adobe Creative Cloud Cleaner Tool and reinstalled Photoshop CC 2018
• 'Seeded' the folder structure from a working version of Photoshop CC 2018 on a different machine
• Reinstalling Photoshop CC 2017, creating a custom test preset of a measurement scale and then upgrade to PS CC 2018 - This wiped the custom preset and restored a test preset from CC 2018
• Removed all traces of Adobe install in every location on the computer and reinstalled PS CC 2018 as per recommendations from a senior technician

Steps that don't apply:

• It's not a preset function, it's a .psp file that gets loaded in the backend that populates Photoshop's measurement scale presets. For some reason this is not connected to normal presets. The import presets function does not appear to recognize .psp files.
• There's no load from file or export for measurement scale settings for some reason, despite the option existing within Photoshop to create and save custom presets.

Strange inexplicable functionality:

• The test case of using PS CC 2017 and then upgrading to PS CC 2018 points to Photoshop having resumed functional operation within a different folder location upon the install of the upgrade, as a custom preset (created in PS CC 2018 prior to the downgrade test) remains active upon every installation now, despite there being either no Settings folder at all or a completely empty one. I have not been able to ascertain the location of this new structure as there I could not find a discernible way of tracking down how javascript plugins (which appears to govern this function, if I'm reading the MeasurementScaleMarker.jsx file correctly) get written on a specific machine.
  If this current functionality can be tracked down there could be some explanation to how and why this problem has arisen and seems to be our best case of fixing this issue.

Two separate machines in the building have been tested with slightly different versioning (one the same and slightly older) of Photoshop CC 2018 installed, both work without issue.

This machine runs Windows 7 Professional 64bit v6.1, SP1 on a company Network - the other two successful machines also.

I believe that I've exhausted the customer support resources - they don't seem to be able to point towards any potential fixes either, so I'm hoping someone on this forum may have a fix in their back pocket.