Speeding up the game(Tab key) issue

[[Unknown]]

Check the control mapping. The key can be mapped to different buttons - maybe you did this by accident?

I personally rely on this feature heavily, and would be strongly against its removal. My productivity would plummet.

It is possible that something the game is doing is making it very slow. Maybe it's not speeding up because it can't? Does it not work anywhere, and in any game?

If it does work some places, but not there, you can probably get the old behavior by checking "disable slow buffer effects" and unchecking "simulate block transfer" in the settings. Both options relate to new features, which can often be slow, but make rendering a lot more correct in some places.

Lastly, why v0.9.9? That's pretty old. I would suggest you update to v1.1.1 or even the latest git build.

-[Unknown]