You probably already saw this, but his reply to you:
just delete this file
\my documents\my games\gratuitous tank battles\prefs.ini
EDIT: This post was modified for accuracy due to player malfunction instead of interface malfunction.
Caught it, haven't gone back yet. There's a number of minor things I can forgive pretty easily.
There's twitches and minor things I can ignore, and for an Indie I can even push over a few major items (major in my mind anyway).
My own stupidity in not keeping my drivers up to date caused some strangeness however and I couldn't nail down the cause inside the original software, and caused me to over-react in annoyance after a long day.
Sorry Cliff.