0 Replies Latest reply on Jul 8, 2015 12:37 PM by annaw86638390

    Extension 'does not contain a valid signature' issue with plugins


      Hi. I urgently need to install an indesign plugin I purchased for my old mac 'Ctrl Layers'. When I've tried installing it on my current machine it gives me the message 'Extension does not contain a valid signature' and won't install. I've tried installing the updates for Extension builder, and contacting the plugin designers for a certificate but have had no luck. Any suggestions would be very helpful, thanks!