I have resolved this issue myself
Changing core settings (command-line arguments) while the browser is already open and rendering a page causes the Chromium graphics engine to crash, resulting in the screen immediately turning black
Refund
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I had the same problem and no one is fixing it. They don't care about keeping customers here — personally, I won't renew again
https://community.bablosoft.com/topic/30689/bablosoft-is-at-rock-bottom-trying-to-steal-40-from-me/22
