Hi. When I have a large query that I want to edit, the query editor becomes very slow. For example I would highlight a piece of the query and it wouldn't even show that it is highlighted, or I would move the cursor and the it doesn't show that it was moved. If I select the whole query and then click somewhere on the screen to deselect it, there will be a blue line running down the screen on the left. It is as if it doesn't refresh quickly enough.
I did install the latest version and the only thing that changed when the problem started was that I got a 4K screen with high resolution.
Please let me know should you need more details.