I used Tango icons and [Icons] Minimalism from this topic viewtopic.php?t=41711
Its really simple to install:
- Backup default theme if u need it.
- Download archive
- Open "Install.txt"
- Change if u need it _DELUGE_PATH="C:\Program Files (x86)\Deluge"
- Save and close
- Rename "Install.txt" to "Install.bat"
- Close Deluge client
- Execute "Install.bat"