I have been using the version from here and it has been working great, and I realy like that i can place items directly from Fiddler with it. Releases · polserver/UOFiddler
I'll just specify. UO Fiddler is not bound to the emulator version. So ServUO, RunUO or sphere. But it's good to know for which version of Ultima Online we want to use it. Sometimes it is better to use an older version of the UO Fiddler for the old version of the UO and sometimes the latest for the new version of the UO. But also the latest version of UO Fiddler works well with older versions of UO.