Hi DevilPup2016,
The editor may be laggy specifically because of the system it is running on. It is good to get this information out of the way as quickly as possible to eliminate the possibility that the reason the editor, which is a performance intensive software, is running poorly is due to hardware that isn’t up to our recommended specifications.
If the hardware is not up to the recommended specifications, I can offer suggestions on how to marginally improve performance such as reducing your engine scalability settings, turning off update BSPs automatically, and work in projects with minimal rendering needs. However, I cannot guarantee that the editor will run faster even with these modifications made. If you could, please provide your dxdiag and I’ll be able to tell you whether or not your PC is on par with our recommended specs and, if so, we can delve deeper to find what may be the root cause of the lag.
You can find our recommended specifications here