i’m not able to do that either. worked fine until last few wp updates. when i select option it makes no change. really hope someone can help with this. have wp 4.0 and rl 1.4.8
product page ex:
http://jefdesigns.com/product/geode-print-cream/
weirdly slideshow works in non product pages:
jefdesigns.com/company/on-location