They only show as "unused" because your restored Armory is not online, so can't see any transactions for your addresses. How can it tell if the address was used or not if it cannot see the blockchain data? 
Did any of the addresses that it generated show any transaction history if you look for the address on a blockexplorer? Chances are that you need to just look further down the list, and/or you need to find the "change" addresses that are holding your coins from any transactions that you have previously made.
Without knowing the full details of your transaction history... ie. how many send/receives you did, it's difficult to know in which address the coins are likely to be in now. However, if you can see transaction history for these addresses, at least you know you're on the right track.
Personally, I would just use a text editor to get a list of the "addresses", then bulk import the addresses into an Electrum "watching only" wallet... find the addresses that have the coins, and then import/sweep those private keys. (or maybe just bulk import all the private keys?)
Did any of the addresses that it generated show any transaction history if you look for the address on a blockexplorer? Chances are that you need to just look further down the list, and/or you need to find the "change" addresses that are holding your coins from any transactions that you have previously made.
Without knowing the full details of your transaction history... ie. how many send/receives you did, it's difficult to know in which address the coins are likely to be in now. However, if you can see transaction history for these addresses, at least you know you're on the right track.
Personally, I would just use a text editor to get a list of the "addresses", then bulk import the addresses into an Electrum "watching only" wallet... find the addresses that have the coins, and then import/sweep those private keys. (or maybe just bulk import all the private keys?)
OK, something like this did cross my mind. The list of unused private keys was huge, and I only tried to import a few of them. None of those had anything on them. So, if what you're saying is correct then at least one on this list will have the bitcoin on? As far as I know, the bitcoin was loaded onto the wallet a few years ago and hasn't been touched since.
I don't think the exported data showed any wallet addresses, only private keys.
Edit: Oh no I see there's an option to get the wallet addresses. I think probably the best option is to bulk sweep private keys.
