My desktop resolution/refresh rate is 1920x1080@144hz. When I start space engine, the default setting is full screen with matching resolution, but refresh rate is 60hz. I can change it to 144hz, click apply but notice that the new refresh rate does not apply. I have to switch to windowed mode then back to fullscreen in order for the refresh rate to properly apply.
That's my normal routine when starting space engine, it's quite annoying having to do it every time. I hope this is fixed in a future release.
My desktop resolution/refresh rate is 1920x1080@144hz
You may not use the "custom display resolution" checkbox in SE. Simply Check "Fullscreen" - SE will expand its window to cover entire screen, without changing resolution and refresh rate. Also, there is a special thread for bug reports: http://en.spaceengine.org/forum/4-2977-1