Hi Brogaard,
Please note that this forum is only checked once a week- that’s why you haven’t heard from me.
The only thing string I see that is not translating on your site is Find Events. Yes, you might try updating the .po file with the latest .pot file. I did that and my Danish translation is working (https://cloudup.com/c3Hi6667Du5). If that doesn’t help, you might doublecheck that your customizations have not effected that string.
You can just ignore the PRO and Filter translation files- they won’t be any use to you unless you also have those plugins. They were just in the same post as the newest core ones.
Best,
Leah