Beginners error - WB on icandescant outdoors

Is there a way to save this image and others which I took today before realising the WB had been left on incandescent. Taken on Nikon D40.

Many lessons learnt here. Would shooting RAW have been the saving grace as I believe it is possible to adjust WB using Adobe camera raw.

Thanks for any pointers/help.
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JohnB

One photo out of focus is a mistake, ten photos out of focus are an experimentation, one hundred photos out of focus are a style. Anon