Thanks, I tried using the seed phrase and failing that directly importing the wallets. I'll give your method a go.
Armory doesn't support seed phrase.
What you used for exporting your wallet from Armory was probably your root key. Don't get it wrong with a seed phrase.
A seed phrase is a list of meaningful words (usually 12 or 24 words).
Armory's root key is a series of random letters.
Note that, Armory's root key is not compatible with other wallets and can be used only in Armory.