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looks like you had wrong game version, 0.6.5b probably

Thanks for the reply, but how do you figure that? The window says it's game version 0.6.5d. 

eml overwrites game version so even if you play 0.6.5b, whatever eml version uses will show, 0.6.5d in this case
also build_unique_sprites was added in 0.6.5d

Thanks a bunch Zeltop, that fixed it :)