Sorry I've just seen there was a space before the start of the path entry for eac3to, removing it fixed the problem and it's now working. Sadly HdBrStreamextractor still doesn't see the ArcSoft decoder and resorts to libav. I wonder if I should try just using the standard eac3to.exe command line executable to run the extraction? It's a bit complex for me though, I also have this GUI version: 'yr_eac3to_more_gui.exe' even this looks complex for me but I'll give it a try