Action for change multiple artist delimiter

[Syco2oo5]

How to batch replace the last comma with ampersand (&) character.

Use an action of the type "Replace with regular expression" for ARTIST Search string: (.*), (.*) Replace string: $1 & $2 Due to the greediness of the expression, only the last comma is replaced. Should work with any Artist that has comma in the name. Will produce problems for artists that already have an ampersand in the name like "Emerson, Lake & Palmer", "Earth, Wind & Fire", "Bell, Book & Candle".

i used this. changed the search string from comma to semicolon and it replaced all not only the last one.
also when i changed all to comma, like the first poster had, it and i used the same string, it changed all to ampersand.