Lag with Retroarch

[PorkyPig]

So I've been running emulators forever, but fell out of the scene for probably the last decade, we wound up with many old consoles and games so I just used to real thing.  I was stoked when emulation came back on my radar at the advances that have been made in the front ends and groupings and streamlining and metadata etc.  I found Launchbox and am blown away.  It's like a living encyclopedia museum of video game history.  Anyway, I set it up and it looked like Retroarch was the way to go, so I set it up with Retroarch.  I started populating with snes roms.  I used the core "snes9x current".  Everything lagged like crazy.  I was surprised because I was able to run snes roms over a decade ago seemlessly on inferior hard ware.  I couldn't readily see how to apply a new core to all the snes roms so I deleted everything and started over.  This time I directly downloaded the current version of snes9x and just used it instead of RetroArch and everything worked perfectly, which was awesome.  However, it seems like I really should use RetroArch for all types of reasons, mostly being everyone else seems to and everything is in one place in your emulators folder.  I know think maybe I should have just applied a different version of snes9x and checked if it was better.  I see some people saying the 2005 version works good.  I guess my question is how do you apply a new emulator choice to the whole batch of a given systems roms?  Maybe just delete all the current ones and re-import?  Thank you for the help.  I am running a Gateway laptop, older i3, windows 10 64bit, 4gb ram.  Not the best system but the direct current version of snes9x works great.

==Porky

[PorkyPig]

Nevermind!  I found if I hit Control-A to select all, right click, and edit, a bulk edit wizard is available!  Awesome product!