"Since I do like mm's sigmoidal contrast plugin, I'm happy that at least I don't have to use the hack anymore to get this plugin to work, but mm's labcurves plugin still bugs out, so I added a comment at Mickey's thread at the registry and hope he will find a work-a-round to it since labcurves is a cool plugin in (both need TIF; wish Mickey would have used PNG. lol)...
It is after all the solution (important - ShellOut in version 0.7):
["LabCurves", "\"C:\\Tools\\LabCurves\\LabCurves.exe\"", "png"],
["EAWTool", "\"C:\\Tools\\EAWTool\\EAWTool.exe\"", "png"],
also for Photivo:
["Photivo", "\"C:\\Program Files\\Photivo\\photivo.exe\"", "png"],
Ps. LabCurves requires a complete library Python tcl