1) Take your SD Card to your PC
2) Find the folder under SD:\usbloader\ or something similar to this.
3) Take this file, and simply delete it.
*Note: I know this sounds dumb, but this is a cache file folder, and it sto's away all of your images, load paths and everything here
it's safe to delete.
4) After deleting, navigate to the folder SD:\apps\USBLoader_GX\ or one that seems similar in that nature (i.e. USBLOADERGX, Usb_Loader_GX, etc.)
5) Delete any other files other than
- boot.dol - save it!
- meta.xml - save it!
- icon.png - save it!
*Note: Again, these files are the basis
for your USB Loader loads, the others are safe to delete
6) Try downloading your covers again
Hope this helps