I've tried the instruction on custom weather icon using zip file from your upload.
I unlock in the 'global' tab all icons and pointing each icon to corresponding extracted file in my sd card. But when I lock the icon, the path seems back to default (see attached).
The path might be fine, is it working? Because that path might also point to the SD card (and BTW you do not need to lock the globals back, just export the Komponent again and reload it to test if it works)