I purchased the HVEC capability. But when I attempt to use it, I get an error message about an external codec. I've checked all the settings, and I've even restored the software to it's original settings. Still, nothing. I've tried it in default encoder and Main Concept encoder modes. Same thing. Nothing. I've been using MEP since 1999, and have had every version produced. Currently running MEP2017+. (With the most recent update) My computer runs a Q9550 Core 2 Quad. (Overclocked at 3.51 GHz) It has 16 gig of DDR2 RAM. It has an NVidia GTX-750Ti GPU, with 2 gig of DDR5 RAM. And it's running Windows 7 Ultimate 64bit, with 4 TB of SSD HDDs. Does anyone have a solution? Is there something I haven't done? Any help would be great. Thanks.