I always Run 1920 x 1080 @ Fantastic, i think i only set it to fantastic once in the manual loadet 64bit version and the 32bit and the itch.io app always used these settings.
I think this could be that my SSD was crowded and only got 3gb left. I will look into it after doing my mails. The System is cleaned atm. ;)
Just a thought cabal, you might want to get a hard drive and put ALL your games and files on there, but keep the operating system on your ssd. you're lag issues are from the ssd. if it is over half full the ssd starts slowing down. investing in any size hard drive to put games and stuff on will greatly help you. and with files i mean documents, desktop, etc. i can give you some instuctions on how to do that if you would like. it will certainly help. i did it to mine and it's running twice as fast.