Those of you still experiencing problems with the GUI scaling, please try my following test version:
https://sourceforge.net/projects/wsjt-x-improved/files/WSJT-X_v2.6.0/Tests/wsjtx-2.6.0-rc1-01-win64.exe

It is the normal official WSJT-X v2.6.0-rc1, but with different settings regarding scaling of the main button width.

But note my previous hint: If you change the font size and/or there are problems with the layout, then restart WSJT-X once. This is necessary so that the WSJT-X GUI automatically adjusts the width of the buttons correctly.

73 de Uwe, DG2YCB