After finding a search match, click the Previous button to the right of the Replace button on the Search toolbar or select the Replace and Find Previous item in the Search menu to replace the selected search match with the replacement text, and to immediately continue searching for the previous search match. This button is a shortcut to clicking the Replace button followed by clicking the Find Previous button.
The Replace and Find Previous command is not available in regular expression mode. Regular expressions cannot search backwards.
Search menu
Search|Prepare to Search
Search|Replace Current
Search|Find Previous