@wownmnpare
MHX has no encryption. All you have to do is just use savedatafiler. All of these are explained in the first post. Currently and updated by the TS.
1. Open SDF.
2. Export the Extradata. It's the 2nd tab labeled 'Ext'.
3. Locate 01554. Press Y to export the ext save data to SD card.
4. After exporting the extra data, it should be located in your sd card inside the folder "filer".
5. Copy the data which contains 'system' and 'system_backup' to your PC.
Don't forget to make a backup.
6. Edit the 'system' file using the app.
7. Copy it back to the SD card. Overwriting the old one.
8. Use SDF again, under SD (3rd tab), import the data 01554.
9. Exit. Proceed to MHX. See the changes.
The Item IDs in the MHX save editor are located at \SavEditor\data\MHX\Item_ids.txt if anyone wants to edit it in its proper english translation.
Thank you so much. im going to try it right now