Long time ago we could have desktop in 1920x1080 (native resolution) and DCS in 2560x1440 (with DSR factor) it's just impossible now, that's was fine. I don't want / can't buy a new monitor
In the post before yours you have two links in post from april 17 /Rudel-chw with OvGME screenshots the first is for the mod compatible last DCS version (goes in Saved Games), then the second is the fix you have to past in DCS core
Saved Games https://1drv.ms/u/s!Ai6cuX3YQI26h9JE4RY9YQlWXv9SRw?e=8eaIZo
DCS Core (fix) https://1drv.ms/u/s!Ai6cuX3YQI26h9JDq-My2YN2UBxBCw?e=SYjG3G
Hope this helps you
OvGME is more friendly to use, nothing goes in DCS folder, your "Mods" folder can be where you want and easy to manage DCS core folder and Saved Games. There is another GME software but I didn't try it
You can change the location of your Saved Games folder it's easy. How did I do ? First I create a "Saved Games" folder in F:\ for me, 2- Right clic on your Saved Games In C:\ => Property => Location => See screenshot (sorry Windows in french) and DCS will find new Saved Games folder.