I bought a Gateway 3DS and a Sky3ds at Realhotstuff using a MasterCard Gift Card about 2 weeks ago,but before that last year I bought 2 supercards there also using MasterCard Gift Card, but sadly it looks like Realhotstuff no longer sell them.
Finally I fixed, all I had to do was downgrade to the 9.0 version and now it's working again. I think you were right, there was probably a corrupted file.
@K3Nv2 I got some cheapies at wallys, that are pretty good, already have lost a few expensive ones (one falls out and gone, can't find) while cutting grass so bought some cheap ones, and of course never lose these cheap ones. (Cheap meaning only $35, compared to air buds which I only have 1 of 2 now)