I'm new to Affinity having been a long time Adobe user. On the iPad I'm getting to grips, but on my iMac and MacBook Pro I'm also getting the "affinity photo could not be launched" message with the Mac trial versions. The extensions to DEVELOP, HAZE REMOVAL etc seem to work, just not "EDIT IN AFFINITY PHOTO". My iMac is running 10.12.5 (16F73) and my MacBook 10.13 beta (17A291). JPG files.