Thanks, MysterD. I know you're trying to help. But if you don't have a magic wand, I still don't think that my potato of an i3 is going to play Jurassic Park.
And before anyone else says something snide or snarky about me upgrading my PC, understand that (a) I'm not concerned about upgrading because I have enough stuff to play from the past 35 years of game collecting, (b) I have other things that I need to do with my money, and © I just don't care.
Besides, I usually play Caveblazers, Nuclear Throne, and Spelunky and turn the damn thing off because it's time for bed.
To sum this up: basically, all you need to do is turn-down or turn-off through the config files these things AA [Anti-Aliasing] (hmmm, I wonder if it's using a high-end MSAA or SSAA here), Ambient Occlusion, Rain, Water, Shadows, and any of the fancy graphical stuff to get MUCH better performance.
Drop those settings in the Shadows Section to Low or 0, where necessary.
If you want to go further and tweak more, keep reading.
You could also drop texture quality down, if need be - drop it from High down to Medium or Low.
You could also lower resolution, if need be. Normally, I try to aim for 900p to 1080p at 60fps...or better. If it's older games (in which they weren't always trying for 60fps) and/or poorly coded games (Dark Souls: PTD Edition) - well, you might really be stuck w/ just aiming for 30fps in some cases.
If you're willing - you could try to go for 720p...or even lower. Might not look so hot at that, w/ such a newer title though.
If you're getting better performance (i.e. you hit 30fps to 60fps w/out hitches or drops) - you can probably go from there and tweak, turn on back some stuff and experiment...and see if you take enough performance hits, once you turn something back on. It a setting still runs okay to suit you when on - keep it. If it runs poorly - go back and disable it or turn it down.
You could always work in reverse too - go High...and then turn off stuff one by one. See once you get to a nice framerate at settings you are happy with - and just stop tweaking.
If you have a decent NVidia card or AMD card - you could always disable settings in the config files in-game...and then in turn do stuff via NVidia Control Panel or AMD Panel. You could always force FXAA (Fast Anti-Aliasing) through their respective panels for JW:E's profile (or globally, if you want to force FXAA on everything), as those don't offer much performance hits and can improve image quality still a bit.