Say I want to switch it back to allmusic.

Anyone have any info to put in where it will search allmusic for covers? Wherever the defaults is finds smaller and lower-resolution covers than I'd like.

Click on options and then the "other" tab. Put a check next to "Disable Automatic Album Cover Lookups". It should now look for them either in the id3 tags or in the folder the song is located in.

Yes but I don't have them there. I want to choose the site where it automatically locates the covers at.

Sorry, to my knoledge that is not possible in this version. The images are low resolution for loading optimization, so if you use high resolution covers be warned that your load times will increase. I have inputed my covers with the id3 tag editor in eJukebox and this is the only way I know of to use the images of your choosing.