Thanks for the quick reply.
I installed an optional firmware update shortly after I updated the app.
The update has changed the window positioning.
Maybe that's causing the issue.
Unfortunately, I can't find a way to undo the change.
Okay, I'm an idiot.
I just found out that you can resize windows (was that always possible? O.o).
It still looks a bit weird, I have to drag it to the maximum size to see all the important elements so the window is huge now.
I'm pretty sure this is due to the v69 update.
Well, the app is fully functional again.
Thanks for your help and sorry for wasting your time.