changing narrative view

[R2T1]

Almost finished my BASIC to Adrift rewrite/port and have begun to check over to make sure I've got it all, when I realised I have parts written in FIRST person & parts in SECOND person. (Probably not checking thoroughly before resuming after a short break at the end of last year)
Is there an easy way to edit the text to ensure I fix all of the appropriate narratives?
The only thing I can think of is to export the entire game as an .AMF file and go through it with a word processor then re-import it.
I know it'll be a bit of work whatever way, so I'm open to the easiest method anyone has used.

Thanks again for all the help along the way - now just this one last hurdle.(hopefully)

[Campbell]

Depending what you're changing, Search and Replace has a Replace All button. However, if you want to check each case the export/import option might be better.