Using photoshop and Bridge CC with 8k monitor

I am using a high end computer with a Dell UP3218k monitor and NVIDIA RTX4000 graphics card. I have resolution magnified to 500%, which makes the screen readabel in most apps. However, photoshop and Bridge do not respond and give minuscule font and controls. Thge mouse curson in Bridge, in particular, is a single pixel. This won't do. 

Searching the net, I have tried the fix Properties => Compatibility => Change DPI settings => Check override DPI settings. In Bridge, this gives a normal looking UI, but the mouse remains invisible and the product is unusable. Photoshop reacts badly, with the UI normal looking but the menues offset and unusuable. Removing this option gives a mor eor less normal system. However, if you fire up RAW from Bridge you get a disaster, with the image being processed shown mostly off screen and the end session buttons concealed. Mouse cursor is small buit usabel, but impotent. 

There is also a fix mooted which involves side-by-side registry modification, and a file containing code that needs major modification to worlk at all. (Set for AMD, onsolete Windows version.) This has no effect in Bridge and causes run errors in Photoshop, so not recommended. 

This is a farrago: neither product works with high res screens. I could, no doubt, use a duela setup and throw the image alone onto the 8k screen, but having spent many thousands on this, I am not willing to compromise. Does anyone have a fix to offer?