Alright, I've looked in the faqs etc. but couldn't find a solution to my problem. It won't boot up. I load it up, it goes loading itself (you know, with the japanese characters in the beginning) and it says: Start log file. topsector=15236160 size=32768byte AppName MoonShell Ver 2.04 stable Jul 18 2009 23:43:34 GMT+09:00 ARM RVCT3.1 [Build 794] __current pc=0x0200f010 sp=0x02803eb0 DLDI: active_interface= 0x02016860, ID= RPGS, Name= Acekard AK2. active_interface->ul_Features= 0x23. BlockWriteLimitSectorsCount=255. Boot with DSi. Shell_FAT_fopen_Root=/MOONSHL2/VERSION.DAT Installed data folder version ID: 0x02000007. main.cpp:251 CheckDataFolderVersion: #00000: Illigal data folder contents version. Application halted !! Please refer [/moonshl2/logbuf.txt]! ...Which is quoted from the logbuf. If you know the answer, please share it with me! Posting a link to another topic and saying that I should have looked better is fine, too. Thanks in advance!