Yeah, but that's only DS games. Not 3DS games.
EDIT: Oh yeah, OP, I'd recommend Sky3DS over Gateway since you have no way of knowing whether the 3DS you'll receive will be 9.2 or lower.
You can't run Smash on 4.5E. If you want to, buy a Gateway right now, or buy Cubic Ninja and run Pasta through it. Alternatively, wait for Pasta 9.2 MSET to be released.
EDIT: I'm assuming that you're using Pasta so if your emuNAND gets deleted it shouldn't matter as you're going to be booting to sysNAND to install DevMenu (via PBT-CFW).
Backup your SD on your computer, and then format it using SDFormatter using options:
Format type: FULL (OverWrite)
Format...
I had the same problem and what fixed it was reformatting my SD card using SDFormatter, and then putting the files back.
EDIT: Read the post below me :p
Install devMenu via PBT-CFW. Launch it in PastaCFW and then install CIAs.
EDIT:
Page 156 has the original post by nop90 and Page 160 has the encrypted MSET launcher for Gateway ROP by pakrett