Normal non-rounded corners

Seriously, who thought it was a good idea to round the corners of C1 even if you use an OS that has squared corners? Just make them squared, like every other program.

Every single time I want to close CaptureOne, I click in the top right corner but because it doesn't exist since the corners are rounded, CaptureOne stays open and I close the window behind it.

It's a waste of my time and I feel like I am being trolled. I am quite fortunate I only use the free Express version, so at least I didn't pay to get trolled.