I need to run some old (from 2004) notebooks but am running into a bunch of syntax errors due to this encoding of decimal fractions that separates the decimal point from the numerals:

RowBox[{
                      StyleBox[".",
                        Evaluatable->True],
                      StyleBox["000012",
                        Evaluatable->True,
                        FontColor->RGBColor[1, 0, 0]]}]]}]

I tried opening the notebook and then accepting the "Continue with updated styllng" and also "Revert to older styling" but neither corrects the syntax error.

Is there some automated way of correcting this error?