O site do Ultraedit diz -
If you'd like to globally configure UltraEdit to save all UTF-8 files with BOMs, you can set this by going to Advanced -> Configuration -> File Handling -> Save. The first two options here, "Write UTF-8 BOM header to all UTF-8 files when saved" and "Write UTF-8 BOM on new files created within this program (if above is not set)" should be checked. Conversely, if you do NOT want the BOMs, make sure these are NOT checked.