Just tried it, updated with DS lite, working just fine on 3DS XL.
Info here: http://r4ids.cn/r4i-download-e.html
Download link: ftp://r4idsdown:[email protected]/R4iGold_3DS45_NDSi145_Patch.rar
Info here: http://r4ids.cn/r4i-download-e.html
Download link: ftp://r4idsdown:[email protected]/R4iGold_3DS45_NDSi145_Patch.rar