Hi,
My apologies, I think I missed this or just didn't notice it yesterday, but I'm afraid there's another bug.
When the app loads a saved DeepL preset, I'm unable to change the languages for the DeepL translation, the language options are grayed out.

The only way I've found to fix it is by deleting and re-pasting the API key. After that, it works normally.
Sorry once again. 😞