Wootique Slider Featured images size

Hi, the thumbnails are apperaing fine throughout the site, however, when using the FEATURED images for the slider, it uses a 90×90 pixel size thumbnail that I have no idea where the setting was to create that size! I have set the minimum thumbnail sizes via the media wordrpess settings, via wootique setting (dynamic images) and then am also using the regenerate thumbnails plugin… and the thumbnails are updated everywhere except the home page featured images slider.
Anyone know why this might be happening??
TIA