iStock have changed their web this week. We are aware of these changes and the ProStockMaster update is already completed. We still check various compatibility issues. The upgrade to v1.9.1 will be offered very soon. Note, that if you still run anything prior to v1.9.0 you have to upgrade to v1.9.0 first by installing the full version of ProStockMaster v1.9.0. Follow this instructions to upgrade to v1.9.0.