First, python missing from the Windows version. It is fixed. Have you updated your Windows Gimp 3.0 to Gimp 3.0-1 It is the default download now. edit: not absolutely necessary for resynth but you should do it anyway.
As JamesH zip There are 3 scm files that go in your scripts folder
and one executable that goes in your plug-ins folder.
And that works I have tried it.
but… the script-fu files start with a shebang
#!/usr/bin/env gimp-script-fu-interpreter-3.0
and they are really script-fu plugins that go in the plug-ins folder with the requirement each in their own folder with the name of the plugin.
as
Up to you which method you use, the same files but bundled as plugins attached.
resynth-gimp-3-as-plugins.zip (132.9 KB)