Apple Photos & Gatekeeper
I've installed Silver Efex Pro 2 and use it as an extension within Apple Photos by right clicking on an image and then selecting 'Edit with ...' and choosing the application. When I open the application like this, I always get a dialogue windows "Silver Efect Pro 2.app" is an application downloaded from the Internet. Are you sure you want to open it?", aka the Gatekeeper. You then have to click 'Open'. When I open the application directly from Applications, I don't get this popup.
How can I get rid of it?
High Sierra 10.13.3 (17D102), Photos 3.0 (3251.12.190)
iMac