I know only one editor for push, but it have an only "ru" locale. if you still interesting, I'll send it via pm.
replacing depends on fitcloud version
*for 1.5.4 or less:
- clear "\\android\data\com.topstep.fitcloudpro\files\download\" folder for clear understanding what exactly file you need
- install any wf
- now go to "\\android\data\com.topstep.fitcloudpro\files\download\" folder again. if it have an only one "bin" - it's a file what must be replaced. if you'll see two of "bin"s you'll be forced to guess. just replace one of it and if you'll fail - replace an other. or replace both for sure.
- go to last tab of fitcloud watch faces interface (list of installed) and install it again
*for 2+
- select installing customizable watch face (thirst in list). after it'll be download and "prepeared", before "push" it, go to "\\android\data\com.topstep.fitcloudpro\files\download\" folder, find "bin" with name starts from "temp_" and replace it.
- go back to fitcloud and now tap to "push"
do not try to install tbui watch faces, you have a chance to brick your watch.