R4igold still works on all the firmware of Dsi but now as R4igold clone are available , it will be great to use that only as it won't cost you much as the original one.
My r4 has been stuck many times, and even I have resolved it many time but this time it's taking me more time to solve the problem . I think some of the mentioned thing over here will solve my problem to a good extent.
The only thing that should be in the NDS folder is the Browser.nds, which you have to patch it, not put the patch in the folder otherwise this problem won't be solved.