Just installed Pluggo 3.5.4 & I get this message for each and every plugin during the AudioUnit Scan " can't load because it can't find the files it needs inside the Extensions folder. You should reinstall Pluggo"
-- even though I just reinstalled, and then tried reinstalling a couple more times just in case...
I looked on the list and found one message reiterating that the installer should be placing some files in my Extensions Folder... but there's nothing being placed there, so if that's the problem, then the installer isn't working.
Mac OS X 10.4.6 on a Powerbook G4.