Not via the Explora I don't think - you will need to use the Showmax App via a SmartTV or stream from a laptop or phone - and will have to pay the full Showmax subscription. All of these have more functionality than via the Explora in any case.
Octo-LNB to 2 x 5.2 switches. Explora1 (Prim) & HDPVR 2P (Sec), Samsung 55" UA55F8500 Smart 3D LED TV, HDMI picture & audio via Onkyo TX-NR626
receiver. Explora2 in bedroom, HDMI picture & audio to Samsung 32" UA32F5500 Smart LED TV. 100Mbps M-Web fibre (OpenServe).