Colors in the TortoiseMerge

Hi developers,

I really need help, when I merged from trunk to the branch I has
conflict in one file, so I clicked "Resolved conflict". I wanted to take
a look how are colors set in TortoiseMerge(View - Setting - and tab
Colors). And now a problem, in this dialog I clicked "OK" and all colors
have changed in TortoiseMerge(I didn't edit any color!!!). How can I
switch back to default colors(I have accustomed this default colors).
I have tried uninstall and deleted all TortoiseSVN folders in Document
and Settings in Application Data and reinstall, but the colors are still
same.
What I need to do, so as the colors revert to default state ?

Thank for reactions.

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