What OS are you using? In Windows, for the normal Gimp 2.10, right-click on the gimp shortcut and go to properties. Use a switch… Add ‘–show-playground’ after the target path with a space between them like so => “C:\Program Files\GIMP 2\bin\gimp-2.10.exe” --show-playground. Then go to the [Edit → Preferences → Playground]-tab in gimp and there you shall find the “playground” tab. Enable N-Point deformation tool from there.
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