Update README.md

Author: LinuxBeaver

README.md

@@ -35,6 +35,11 @@ Linux /home/(USERNAME)/.local/share/gegl-0.4/plug-ins
 Linux (Flatpak) /home/(USERNAME)/.var/app/org.gimp.GIMP/data/gegl-0.4/plug-ins
 
 
+*note - Windows users may need to create the plug-ins folder if it doesn't exist.
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 ## Compiling and Installing
 
 ### Linux
@@ -52,8 +57,6 @@ ninja -C build
 If you have an older version of gegl you may need to copy to `~/.local/share/gegl-0.3/plug-ins`
 instead (on Ubuntu 18.04 for example).
 
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 ### Windows
 
 The easiest way to compile this project on Windows is by using msys2.  Download