When going code > download ZIP, the old files for the ores are included instead of the updated ones. However, if I go into the ZIP in github and view the individual png files, the correct ore textures are there. Not sure how this has happened

Mmm, that’s weird. If you downloaded the zip via "releases" that would explain it, but if that’s not the case I have no idea why.

Late reply but I just downloaded the pack again and the correct textures are there now

Although I also reported #40 a while back and the observer textures are still missing :/