This is how to do it By Someone who did it and didn't want to do it!
1) Select a couple of files with "Adult Fiction" in the Genre column
2) Press "E"
3) Select Search and replace tab
4) Select #genre for Search field:
5) Enter "Adult Fiction" in Search for: field
6) Enter "SciFi" in Replace with: field
If you now look at the Test text and Test result area you will see everything is as should be. But because I don't care what the current Genre is as I want to change it to "SciFi"...
7) Delete the Search for: field....
Look down - ta da!
SciFiASciFidSciFiuSciFilSciFitSciFi SciFiFSciFiiSciFicSciFitSciFiiSciFioSciFinSciFi
To spell it out:-
SciFi A SciFi d SciFi u SciFi l SciFi t SciFi space SciFi F SciFi etc etc
See attachment
This is, of course, on my setup. To test it you will have to duplicate it....
Please confirm this is a bug
Please don't say this is performing to spec