My conversion program of choice is usually 2.62 x64.

But today I was having some problems, apparently from trying to convert an MKV file with an Atmos 7.1 audio track. It froze three times when I tried to generate a preview.

Is version 2.62 incompatible or can't handle Atmos 7.1 conversion to AC3 5.1?

Well, I downloaded a newer Vidcoder, version 4.36, to see if it could convert Atmos 7.1.

After I opened it, I tried to import my usual High-Profile preset, but it gave an error.

Can a 2.62 preset be incompatible with version 4.36?