If your game appears to be running slowly, we suggest the following troubleshooting techniques listed below:
First remove any custom logos/graphics/skins etc to see if that resolves the issue. If it doesn't, try the following below in the order listed:
First of all make sure you set your system to run off the maximum performance power plan as shown here - https://www.howtogeek.com/240840/should-you-use-the-balanced-power-saver-or-high-performance-power-plan-on-windows/
Once you've done this, run through the following:
Sometimes after an update an anti-virus program can interfere with the game, so even if you've not had any issues previously it's very much worth making sure there's no interference.
Edited by Neil Brock