since MHX and MHXX don't have Hiryu and Lodestar armor, if you keep them armor in XX, you will get crashed everytime you move to those armors/weapon.
Solution:
-make a backup of your MHG data.
-go to MHG and delete Hiryu armors, Lodestar armors, Lodestar SnS. You can keep the Hiryu DB tho (Light...