>> Hope it clears up the problem for you.
>
> Yes, it seems to have solved the problem
>
> Once I downloaded the latest version, I simply allowed it to
> setup in the original directory containing the old programme.
> Hence, it overwrote the old files. I hope that this was the
> best way to install it.
Yes; that's the best way to do it.
Updating the RA codecs is worth putting on one's list of regular
maintenance tasks -- I do it every few months (or whenever
something appears to be broken with it).