A new effect that renumbers races (Currently, the Summary table only, so it is for use with non-handicap fleets) is available in the Sailwave Effects library link here → RenumberRaces
Please see the full description on the Sailwave Effect library, but it also has 2 other features.
I wrote it last weekend to keep a race officer happy as we were racing 10 different one-design fleets, and they insisted they wanted the Race numbers to be consecutive for each fleet, but the results were coming in with 3 or 4 fleets intermixed but for different race numbers.
Jon