As of R2018a, Matlab does not offer any way to search and replace text, across multiple files. This is a must-have for refactoring larger code bases. (Third-party) UltraEdit's feature "Find/replace in files" is extremely versatile with *.m files, but does not work at all on Matlab's binary format *.mlx (Live Script).
Has anyone found an effective tool? Or will this likely be an ongoing limitation of *.mlx ?
Update 5/10/2018 : one workaround is to conscientiously create M files for all MLX files, which can then be searched normally. In Live Editor, "Save As" M file. Note that as of R2018a, Live Editor does not offer "Save Copy As".