Both Jetwash's graphic enhancer:
And Foobian's Godmode:
https://www.trainsimcommunity.com/mods/c3-train-sim-world/c75-utilities/i2703-tsw-god-mode-alpha-043
Were updated recently.
I found the setting applied to Niddertalbahn by Jetwash were too contrasty which made reading the speedo in the 628 hard to read.
Increase Gammma on NVIDIA control panel adjust desktop colour settings from 1 to 1.27 which seems to improve things.
Also, if you lower viewpoint to have more dash in the view, the contrast reduces a bit.