Fritz 14, GUI Re-setting the clocks in the middle of the game.

I'm sorry if I'm asking an obvious question, but I can't find answers anywhere...

Usually when I am playing a game against the computer in Fritz GUI, in the time controls dialogue box, I will give myself extra thinking time over the computer. It is under Human bonus. Anyway, when I either enter my move incorrectly or something similarly goes awry it usually ends up that the clocks swap and the computer gets my bonus time and I'm left with not very much.

How can I reset the clocks? Or change them in any way? Whatever I do seems not to work. I’ve tried the obvious in Blitz Time controls, I’ve tried Infinite Analysis and then switching back. What is the fail-safe thing to do to alter the clocks?

Thank you.
Andy