Working through this myself. Launchbox is running awful on my rig.
My specs:
Windows 10
Intel Core2 Duo E6750 2.66GHZ
4.00GB Ram
GeForce 210 (Fanless)
120GB M4 SSD
763 games
What's frustrating is that my install of Kodi runs flawlessly and is pretty soup-to-nuts with graphical features It seems that I'm asking a whole lot less of BigBox. I get that my CPU is a relic, but I thought it would be enough to push the BigBox GUI.
I'll try playing with the stock theme to see if I have any luck, but it's quite disappointing.