Maybe i didnt understand how2 use the plugin?
In the last years, i've marked e.g. a rectangle on the background layer klickt on dropshadow, tada a Shadow appears.
I've tried this one minute ago with PSP, no problem.
If i use Shadowtools or other tools they will not work
as you can see no shadow
I've done this hundreds time and it works
What changed:
New Laptop with intel UHD 620 Graphic
Windows 10 with 64Bit
If i try Gimp, same problem