I'm trying to export a private key so I can add it to omniwallet.  The address contains some MAID.

3Qs6L5xhAXHupV4KCVo6MSGv6HC4JwqhHD

When I export the private key it shows a balance of 0 on omniwallet.  I read elsewhere that this is because I have a 2fa wallet, and the address doesn't have a single private key.  I restored the wallet from seed and chose to disable 2fa, but it didn't seem to solve anything.

What steps do I need to take to move these coins to omniwallet, if that's even possible?  Thanks.