So,
a) you can import the moonstone file into bts 0.9.3c
b) you see the balance once you have it imported
c) if you export your wallet again, you get empty account keys?
if so, in which account do you see your MOONFUND tokens?
Maybe it is related to the tokens not being tied to a REGISTERED account, if that is the case I know what to do.
As long as you can see your MOONFUND in bts0.9.3c, we can import them into BTS2 eventually .. may be a little more tricky than what is explained in the migration guide