TeXworks 0.6.3 (travis-ci) [r.a2470ca, 16/03/2019 17:06] (bundled with TeX Live 2019 [pre-test]). Attempting to save a new file as "Bundler.cover" with "Save file as" set to "All files (*)" results in the file being saved as "Bundler.cover.tex"; there appears no way to save it as "Bundler.cover" as desired. Philip Taylor