From both the CLI and UI versions pyglossary throws an error when target file exists which forces the user to manually remove the files before converting again.

Expected:

• for the CLI version: a --force -f flag to force remove target file.
• for the GUI versions: a checkbox to overwrite existing or a GUI yes/no alert with the option to overwrite.

Reasoning:

Existence of the target file is not per se an error, and should not be treated as such; instead of forcing the user to manually remove the file it would be more user friendly to warn and allow to proceed.