I'm running
OpenCPN 5.8.4-0 +1637c28 on a Windows 11 PC.
I had no graphics problem with former version but with this version, every time I start
OpenCPN I get a scrambled
screen.
I need to click on "Options" then on "Advanced" and I find a V in the "Graphics" button. I remove it, clicks "Apply" and "OK" and I have recovered a working OpenCPN.
After shutting down OpenCPN when I restart it I get the same problem. It seems that my choice of having "Graphics" not checked is not saved in my parameters.