inPixio Photo Clip Crash error: 'System.Windows.Media.Fonts' threw an exception

The most probable cause is a recent Windows security update: https://blogs.msdn.microsoft.com/dotnet/2018/01/09/net-framework-january-2018-security-and-quality-rollup/

We can offer two solutions until a new Microsoft release resolves the issue: https://github.com/dotnet/announcements/issues/53

1. Uninstall the last security update
2. Uninstall the last .Net 4.7.1 and get back to 4.7.