Im using the latest 9.41 and ive put the plugin in the componets folder go to pref- add
albumart the box opens on foobar but no picture. Im i doing something wrong ? and yes i do have
the jpegs in the album folders..

im far from an expert here but i think you need to adjust the settings in album art preferences -> sources tab. to something like

$replace(%path%,%filename_ext%,)folder.jpg
-$replace(%path%,%filename_ext%,)folder.png
-$replace(%path%,%filename_ext%,)folder.gif
--components\default.*

But you need to figure out yourself the correct strings for your paths. This string above works if your covers are placed in the album map of the artist that is currently playing.