In some cases “old flight simmers” are better than paid professional beta testers, customer support (zendesk) or Microsoft MVP ![]()
Workaround.
Download and install older graphics card drivers for example Nvidia 466.77

No need ![]()
Backup file named ToolBar.css
Official\OneStore\fs-base-ui-pages\html_ui\Pages\ToolBar
After that go to
Official\OneStore\fs-base-ui-pages\html_ui\Pages\ToolBar\
In notepad++ or notepad open file named ToolBar.css
Go to line 46 (opacity)
Change 1 to 0
Before

After

Save changes and run MSFS ![]()

