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Very similar I know, but there's also:
=TRIM(RIGHT(SUBSTITUTE(A2,"\",REPT(" ",255)),255))
Or if you want to do it manually either with the original data or first copying the data to a new column:
1. Select the column by clicking its heading label.
2. Edit|Replace.. |Find what: *\ | Replace with: leave blank | Options>>|Ensure 'Match entire cell contents' is NOT checked|Replace All