Fastrawviewer License Key
: Launch the program and go to Menu > Help > Purchase/Activate .
: This is a common error and usually means there's a version mismatch. Version 1 license keys will only work with FastRawViewer V1, and version 2 keys work with V2 and V1.7.5 and above. Check which version of the software you have installed (Help → About) and which version your license email mentions. It's best to always use the latest version of the software, which you can download from the official website. fastrawviewer license key