You can try update your graphic cards driver to the latest version.
Have more ram on your computer. 4GB Ram and Video-Ram are the minimum requirements. Video-Ram is from your graphic card.
(To check what type of graphic card and how much Ram and Video-ram you have, you can try run dxdiag to get better info)
SSD (Solid State Drive) can improve gameplay, so try switch from running the game from the HDD (Hard Disk Drive) to SSD
If you want more help, you can try go to their discord and ask for help there.
P.S: Ive basicly just ben google searching for solutions about it.