Seems like I became a member in 2013 
I`m sorry but do you have Any other solutions?
This might be a silly question... but have you tried the easy way getting private keys off your addresses?
if your bitcoin in your old pre-HD wallet addresses, their private keys are easy to extract
below is an excerpt from my post helping someone else, disregard some unrelated info
if the menu is available you can extract private key for that specific address, it starts with K or L
if this works I can give you more information or probably you already know what to do next
on your blockchain.info Dashboard menu: click Settings > Addresses
is your1o4PtEAcN address listed under "Imported Bitcoin Addresses" (because your first tx on 2014-01-22)
if yes, to the far right of your address, click More Options > Private Key > Continue
you will see the Private Key for compressed addressbut your address is uncompressed (based on your tx size)
is your
if yes, to the far right of your address, click More Options > Private Key > Continue
you will see the Private Key for compressed address
It`s not one of the imported addresses. It doesn`t give me the exporting priv key option
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Which version did you use? Try using the classic: https://multibit.org/release-info/classic/v0.5.17.html
I just tried Classic, HD and Also a standalone exe file. But None of the give me the option to import a aes.json file. The only place they have to upload a file for priv key, accepts only .key file of multibit wallet.
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And did you try this conversion tool: https://bitcointalk.org/index.php?topic=610555.0
Just tried this one. Worked perfectly.
Thanks everyone for all of your help!